aid: 558686-xyz
name: gpt55-token-gateway
description: >-
  gpt55-token-gateway is the self-chosen service name of an unnamed operator running two
  OpenAI-compatible AI API gateways on the 558686.xyz domain. GPT55 Model Gateway
  (gpt55.558686.xyz) sells single GPT-5.6 Luna, GPT-5.5 and GPT-5.3-codex chat completions,
  deterministic text and wallet tools, and prepaid call packs per request over the x402 payment
  protocol (HTTP 402 quote, exact USDC on Base eip155:8453, payTo 0x1f01...9a2f) with no account
  and no API key, and publishes an OpenAPI 3.1 contract (37 operations), a remote MCP server at
  /mcp that answers initialize and tools/list anonymously with 218 tools, an A2A 1.0 agent card,
  an MCP registry server.json, an ai-plugin.json, an x402 discovery document, pricing and
  live-price JSON, a Postman collection, llms.txt and a Content-Signal robots.txt. A second,
  free, unauthenticated REST surface of 44 developer utilities is served under /api-market for
  API.market import. Sub2API (sub2api.558686.xyz, also api.558686.xyz) is a self-hosted
  deployment of the open-source Wei-Shaw/sub2api relay that resells GPT, Claude and Gemini
  models by Bearer API key at a 1 USD paid = 10 USD platform-quota ratio, with a 3-operation
  OpenAPI, an APIs.json index, Chinese-language docs and public registration currently closed.
  Four retired split hosts (x402-utils, x402-wallet, x402-seller, x402-key.558686.xyz) answer
  HTTP 410 with retirement notices pointing back to GPT55. Source repository
  github.com/wangletiand/gpt55-x402-gateway (MIT); the security contact ops@400860.xyz and the
  Sub2API recharge shop shop.400860.xyz tie the operator to the sibling 400860.xyz record.
url: https://raw.githubusercontent.com/api-evangelist/558686-xyz/refs/heads/main/apis.yml
deliveryModel:
  model: saas
  license_evidence:
    not_product:
    - wangletiand/gpt55-x402-gateway
  open_source: unknown
  commercial: true
  callable_host: true
  label: Hosted service · you call their endpoint
  confidence: low
  source:
  - openapi
  - pricing
  - repository-not-product
  generated: '2026-09-25'
  method: derived
image: https://gpt55.558686.xyz/favicon.ico
x-type: company
x-source: harvest:a2a-registry
x-tier: profiled
x-tier-reason: enrichment pass 2026-09-19 (local-v3; was a2a-registry harvest stub)
specificationVersion: '0.20'
created: '2026-09-19'
modified: '2026-10-06'
tags:
- x402
- Agentic Payments
- MCP
- A2A
- AI Gateway
- OpenAI-Compatible
- LLM
- AI Agents
- USDC
- Base
- API Relay
- Developer Tools
tags_raw:
- x402
- Agent Payments
- MCP
- A2A
- AI Gateway
- OpenAI-compatible
- LLM
- AI Agents
- USDC
- Base
- API Relay
- Developer Tools
apis:
- aid: 558686-xyz:gpt55-mcp-server
  name: GPT55 x402 Gateway MCP Server
  description: >-
    Remote Model Context Protocol server at https://gpt55.558686.xyz/mcp (Streamable HTTP; a GET returns
    the server.json-shaped manifest and /mcp/sse streams the discovery config). Probed anonymously on
    2026-09-20: initialize answered protocolVersion 2025-06-18, serverInfo {gpt55-x402-gateway, "GPT-5.5
    x402 Agent Payment Control Plane", 2026.06.21}, capabilities tools + resources; tools/list returned
    218 tools, each with a JSON Schema inputSchema and MCP annotations; resources/list returned 14 JSON
    resources (x402 discovery, live prices, pricing, buyer guide, agent card, openapi). The server's own
    instructions state that it is a facade: a tool call returns the direct HTTP endpoint, the x402 payment
    requirements and an example payload, and the caller must execute that HTTP endpoint with x402 Base
    USDC payment or a private Bearer key - "this MCP facade does not bypass payment". Registered-shape
    server.json at /server.json and /.well-known/mcp.json (name gpt55-model-gateway, version 2026.07.01-split)
    and a SEP-1649 server card at /.well-known/mcp/server-card.json (xyz.558686.gpt55/token-gateway);
    no entry was found in the official MCP registry and the install guide says no marketplace submission
    has been made.
  humanURL: https://gpt55.558686.xyz/projects/558686/install
  baseURL: https://gpt55.558686.xyz/mcp
  tags:
  - MCP
  - x402
  - AI Agents
  properties:
  - type: MCPServer
    url: mcp/558686-xyz-mcp.yml
  - type: MCPServer
    name: GPT55 remote MCP endpoint (Streamable HTTP)
    url: https://gpt55.558686.xyz/mcp
  - type: ToolCrosswalk
    url: mcp/558686-xyz-tool-crosswalk.yml
  - type: Documentation
    url: https://gpt55.558686.xyz/llms-install.md
- aid: 558686-xyz:gpt55-a2a-agent
  name: GPT55 Model Gateway A2A Agent
  description: >-
    Agent2Agent surface: an agent card served at https://gpt55.558686.xyz/.well-known/agent-card.json
    (and identically at the legacy /.well-known/agent.json) - name "GPT55 Model Gateway", version 1.0.0,
    protocolVersion "1.0", preferredTransport JSONRPC, url https://gpt55.558686.xyz/a2a, provider {gpt55-token-gateway,
    https://gpt55.558686.xyz}, capabilities {streaming false, tools true, paid true}, five skills (chat
    completions, translate, x402 buyer shortlist, wallet signing safety pack, x402 MCP integration kit),
    each priced in USDC, authentication [{schemes: [x402]}]. POST https://gpt55.558686.xyz/a2a answers
    JSON-RPC 2.0 (-32601 for an unknown method); message/send was not exercised because every skill is
    paid. Listed on a2aregistry.org under author gpt55-token-gateway, which is where this record was harvested
    from.
  humanURL: https://gpt55.558686.xyz/llms.txt
  baseURL: https://gpt55.558686.xyz/a2a
  tags:
  - A2A
  - x402
  - AI Agents
  properties:
  - type: AgentCard
    url: a2a/558686-xyz-a2a.yml
  - type: AgentCard
    name: A2A Agent Card (provider-hosted)
    url: https://gpt55.558686.xyz/.well-known/agent-card.json
- aid: 558686-xyz:558686-xyz-base-usdc-api
  name: gpt55-token-gateway Base Usdc API
  description: The base-usdc API from gpt55-token-gateway — 1 operation(s) for base-usdc.
  humanURL: https://gpt55.558686.xyz/x402/service
  baseURL: https://gpt55.558686.xyz
  tags:
  - base-usdc
  properties:
  - type: OpenAPI
    url: openapi/558686-xyz-base-usdc-api-openapi.yml
  - type: Documentation
    url: https://gpt55.558686.xyz/x402/guides/ai-agent-x402-api
  - type: APIReference
    url: https://gpt55.558686.xyz/buyer-guide
  - type: GettingStarted
    url: https://gpt55.558686.xyz/x402/guides/ai-agent-x402-api
  - type: Pricing
    url: https://gpt55.558686.xyz/pricing.json
  - type: Postman
    url: https://gpt55.558686.xyz/postman/collection.json
  - type: PostmanCollection
    url: postman/558686-xyz-gpt55-postman-collection.json
  - type: X402
    url: https://gpt55.558686.xyz/.well-known/x402
  - type: Examples
    url: examples/558686-xyz-standard-chat-example.json
  - type: Examples
    url: examples/558686-xyz-translate-canary-example.json
  - type: RateLimits
    url: rate-limits/558686-xyz-rate-limits.yml
  - type: ErrorCatalog
    url: errors/558686-xyz-problem-types.yml
  - type: Conventions
    url: conventions/558686-xyz-conventions.yml
  - type: Documentation
    url: https://gpt55.558686.xyz/api-market
  - type: Documentation
    url: https://sub2api.558686.xyz/docs/
  - type: GettingStarted
    url: https://sub2api.558686.xyz/docs/getting-started.html
  - type: Pricing
    url: https://sub2api.558686.xyz/pricing
  - type: Login
    url: https://sub2api.558686.xyz/login
  - type: APIsJson
    url: https://sub2api.558686.xyz/apis.json
  - type: LLMsTxt
    url: llms/558686-xyz-sub2api-llms.txt
  - type: Postman
    url: https://sub2api.558686.xyz/postman/sub2api.postman_collection.json
  - type: PostmanCollection
    url: postman/558686-xyz-sub2api-postman-collection.json
  - type: Authentication
    url: authentication/558686-xyz-authentication.yml
- aid: 558686-xyz:558686-xyz-gpt55-model-gateway-api
  name: gpt55-token-gateway Gpt55 Model Gateway API
  description: >-
    The gpt55-model-gateway API from gpt55-token-gateway — 27 operation(s) for gpt55-model-gateway.
  humanURL: https://gpt55.558686.xyz/x402/service
  baseURL: https://gpt55.558686.xyz
  tags:
  - gpt55-model-gateway
  properties:
  - type: OpenAPI
    url: openapi/558686-xyz-gpt55-model-gateway-api-openapi.yml
  - type: Documentation
    url: https://gpt55.558686.xyz/x402/guides/ai-agent-x402-api
  - type: APIReference
    url: https://gpt55.558686.xyz/buyer-guide
  - type: GettingStarted
    url: https://gpt55.558686.xyz/x402/guides/ai-agent-x402-api
  - type: Pricing
    url: https://gpt55.558686.xyz/pricing.json
  - type: Postman
    url: https://gpt55.558686.xyz/postman/collection.json
  - type: PostmanCollection
    url: postman/558686-xyz-gpt55-postman-collection.json
  - type: X402
    url: https://gpt55.558686.xyz/.well-known/x402
  - type: Examples
    url: examples/558686-xyz-standard-chat-example.json
  - type: Examples
    url: examples/558686-xyz-translate-canary-example.json
  - type: RateLimits
    url: rate-limits/558686-xyz-rate-limits.yml
  - type: ErrorCatalog
    url: errors/558686-xyz-problem-types.yml
  - type: Conventions
    url: conventions/558686-xyz-conventions.yml
  - type: Documentation
    url: https://gpt55.558686.xyz/api-market
  - type: Documentation
    url: https://sub2api.558686.xyz/docs/
  - type: GettingStarted
    url: https://sub2api.558686.xyz/docs/getting-started.html
  - type: Pricing
    url: https://sub2api.558686.xyz/pricing
  - type: Login
    url: https://sub2api.558686.xyz/login
  - type: APIsJson
    url: https://sub2api.558686.xyz/apis.json
  - type: LLMsTxt
    url: llms/558686-xyz-sub2api-llms.txt
  - type: Postman
    url: https://sub2api.558686.xyz/postman/sub2api.postman_collection.json
  - type: PostmanCollection
    url: postman/558686-xyz-sub2api-postman-collection.json
  - type: Authentication
    url: authentication/558686-xyz-authentication.yml
- aid: 558686-xyz:558686-xyz-gpt55-retained-high-intent-api
  name: gpt55-token-gateway Gpt55 Retained High Intent API
  description: >-
    The gpt55-retained-high-intent API from gpt55-token-gateway — 1 operation(s) for gpt55-retained-high-intent.
  humanURL: https://gpt55.558686.xyz/x402/service
  baseURL: https://gpt55.558686.xyz
  tags:
  - gpt55-retained-high-intent
  properties:
  - type: OpenAPI
    url: openapi/558686-xyz-gpt55-retained-high-intent-api-openapi.yml
  - type: Documentation
    url: https://gpt55.558686.xyz/x402/guides/ai-agent-x402-api
  - type: APIReference
    url: https://gpt55.558686.xyz/buyer-guide
  - type: GettingStarted
    url: https://gpt55.558686.xyz/x402/guides/ai-agent-x402-api
  - type: Pricing
    url: https://gpt55.558686.xyz/pricing.json
  - type: Postman
    url: https://gpt55.558686.xyz/postman/collection.json
  - type: PostmanCollection
    url: postman/558686-xyz-gpt55-postman-collection.json
  - type: X402
    url: https://gpt55.558686.xyz/.well-known/x402
  - type: Examples
    url: examples/558686-xyz-standard-chat-example.json
  - type: Examples
    url: examples/558686-xyz-translate-canary-example.json
  - type: RateLimits
    url: rate-limits/558686-xyz-rate-limits.yml
  - type: ErrorCatalog
    url: errors/558686-xyz-problem-types.yml
  - type: Conventions
    url: conventions/558686-xyz-conventions.yml
  - type: Documentation
    url: https://gpt55.558686.xyz/api-market
  - type: Documentation
    url: https://sub2api.558686.xyz/docs/
  - type: GettingStarted
    url: https://sub2api.558686.xyz/docs/getting-started.html
  - type: Pricing
    url: https://sub2api.558686.xyz/pricing
  - type: Login
    url: https://sub2api.558686.xyz/login
  - type: APIsJson
    url: https://sub2api.558686.xyz/apis.json
  - type: LLMsTxt
    url: llms/558686-xyz-sub2api-llms.txt
  - type: Postman
    url: https://sub2api.558686.xyz/postman/sub2api.postman_collection.json
  - type: PostmanCollection
    url: postman/558686-xyz-sub2api-postman-collection.json
  - type: Authentication
    url: authentication/558686-xyz-authentication.yml
- aid: 558686-xyz:558686-xyz-gpt55-retained-nonmodel-api
  name: gpt55-token-gateway Gpt55 Retained Nonmodel API
  description: >-
    The gpt55-retained-nonmodel API from gpt55-token-gateway — 6 operation(s) for gpt55-retained-nonmodel.
  humanURL: https://gpt55.558686.xyz/x402/service
  baseURL: https://gpt55.558686.xyz
  tags:
  - gpt55-retained-nonmodel
  properties:
  - type: OpenAPI
    url: openapi/558686-xyz-gpt55-retained-nonmodel-api-openapi.yml
  - type: Documentation
    url: https://gpt55.558686.xyz/x402/guides/ai-agent-x402-api
  - type: APIReference
    url: https://gpt55.558686.xyz/buyer-guide
  - type: GettingStarted
    url: https://gpt55.558686.xyz/x402/guides/ai-agent-x402-api
  - type: Pricing
    url: https://gpt55.558686.xyz/pricing.json
  - type: Postman
    url: https://gpt55.558686.xyz/postman/collection.json
  - type: PostmanCollection
    url: postman/558686-xyz-gpt55-postman-collection.json
  - type: X402
    url: https://gpt55.558686.xyz/.well-known/x402
  - type: Examples
    url: examples/558686-xyz-standard-chat-example.json
  - type: Examples
    url: examples/558686-xyz-translate-canary-example.json
  - type: RateLimits
    url: rate-limits/558686-xyz-rate-limits.yml
  - type: ErrorCatalog
    url: errors/558686-xyz-problem-types.yml
  - type: Conventions
    url: conventions/558686-xyz-conventions.yml
  - type: Documentation
    url: https://gpt55.558686.xyz/api-market
  - type: Documentation
    url: https://sub2api.558686.xyz/docs/
  - type: GettingStarted
    url: https://sub2api.558686.xyz/docs/getting-started.html
  - type: Pricing
    url: https://sub2api.558686.xyz/pricing
  - type: Login
    url: https://sub2api.558686.xyz/login
  - type: APIsJson
    url: https://sub2api.558686.xyz/apis.json
  - type: LLMsTxt
    url: llms/558686-xyz-sub2api-llms.txt
  - type: Postman
    url: https://sub2api.558686.xyz/postman/sub2api.postman_collection.json
  - type: PostmanCollection
    url: postman/558686-xyz-sub2api-postman-collection.json
  - type: Authentication
    url: authentication/558686-xyz-authentication.yml
- aid: 558686-xyz:558686-xyz-models-api
  name: gpt55-token-gateway Models API
  description: The Models API from gpt55-token-gateway — 1 operation(s) for models.
  humanURL: https://gpt55.558686.xyz/x402/service
  baseURL: https://gpt55.558686.xyz
  tags:
  - Models
  properties:
  - type: OpenAPI
    url: openapi/558686-xyz-models-api-openapi.yml
  - type: Documentation
    url: https://gpt55.558686.xyz/x402/guides/ai-agent-x402-api
  - type: APIReference
    url: https://gpt55.558686.xyz/buyer-guide
  - type: GettingStarted
    url: https://gpt55.558686.xyz/x402/guides/ai-agent-x402-api
  - type: Pricing
    url: https://gpt55.558686.xyz/pricing.json
  - type: Postman
    url: https://gpt55.558686.xyz/postman/collection.json
  - type: PostmanCollection
    url: postman/558686-xyz-gpt55-postman-collection.json
  - type: X402
    url: https://gpt55.558686.xyz/.well-known/x402
  - type: Examples
    url: examples/558686-xyz-standard-chat-example.json
  - type: Examples
    url: examples/558686-xyz-translate-canary-example.json
  - type: RateLimits
    url: rate-limits/558686-xyz-rate-limits.yml
  - type: ErrorCatalog
    url: errors/558686-xyz-problem-types.yml
  - type: Conventions
    url: conventions/558686-xyz-conventions.yml
  - type: Documentation
    url: https://gpt55.558686.xyz/api-market
  - type: Documentation
    url: https://sub2api.558686.xyz/docs/
  - type: GettingStarted
    url: https://sub2api.558686.xyz/docs/getting-started.html
  - type: Pricing
    url: https://sub2api.558686.xyz/pricing
  - type: Login
    url: https://sub2api.558686.xyz/login
  - type: APIsJson
    url: https://sub2api.558686.xyz/apis.json
  - type: LLMsTxt
    url: llms/558686-xyz-sub2api-llms.txt
  - type: Postman
    url: https://sub2api.558686.xyz/postman/sub2api.postman_collection.json
  - type: PostmanCollection
    url: postman/558686-xyz-sub2api-postman-collection.json
  - type: Authentication
    url: authentication/558686-xyz-authentication.yml
- aid: 558686-xyz:558686-xyz-responses-api
  name: gpt55-token-gateway Responses API
  description: The Responses API from gpt55-token-gateway — 1 operation(s) for responses.
  humanURL: https://gpt55.558686.xyz/x402/service
  baseURL: https://gpt55.558686.xyz
  tags:
  - Responses
  properties:
  - type: OpenAPI
    url: openapi/558686-xyz-responses-api-openapi.yml
  - type: Documentation
    url: https://gpt55.558686.xyz/x402/guides/ai-agent-x402-api
  - type: APIReference
    url: https://gpt55.558686.xyz/buyer-guide
  - type: GettingStarted
    url: https://gpt55.558686.xyz/x402/guides/ai-agent-x402-api
  - type: Pricing
    url: https://gpt55.558686.xyz/pricing.json
  - type: Postman
    url: https://gpt55.558686.xyz/postman/collection.json
  - type: PostmanCollection
    url: postman/558686-xyz-gpt55-postman-collection.json
  - type: X402
    url: https://gpt55.558686.xyz/.well-known/x402
  - type: Examples
    url: examples/558686-xyz-standard-chat-example.json
  - type: Examples
    url: examples/558686-xyz-translate-canary-example.json
  - type: RateLimits
    url: rate-limits/558686-xyz-rate-limits.yml
  - type: ErrorCatalog
    url: errors/558686-xyz-problem-types.yml
  - type: Conventions
    url: conventions/558686-xyz-conventions.yml
  - type: Documentation
    url: https://gpt55.558686.xyz/api-market
  - type: Documentation
    url: https://sub2api.558686.xyz/docs/
  - type: GettingStarted
    url: https://sub2api.558686.xyz/docs/getting-started.html
  - type: Pricing
    url: https://sub2api.558686.xyz/pricing
  - type: Login
    url: https://sub2api.558686.xyz/login
  - type: APIsJson
    url: https://sub2api.558686.xyz/apis.json
  - type: LLMsTxt
    url: llms/558686-xyz-sub2api-llms.txt
  - type: Postman
    url: https://sub2api.558686.xyz/postman/sub2api.postman_collection.json
  - type: PostmanCollection
    url: postman/558686-xyz-sub2api-postman-collection.json
  - type: Authentication
    url: authentication/558686-xyz-authentication.yml
- aid: 558686-xyz:558686-xyz-utility-tools-api
  name: gpt55-token-gateway Utility Tools API
  description: Deterministic text, JSON, encoding, hashing, URL parsing, and developer utilities.
  humanURL: https://gpt55.558686.xyz/x402/service
  baseURL: https://gpt55.558686.xyz
  tags:
  - utility-tools
  properties:
  - type: OpenAPI
    url: openapi/558686-xyz-utility-tools-api-openapi.yml
  - type: Documentation
    url: https://gpt55.558686.xyz/x402/guides/ai-agent-x402-api
  - type: APIReference
    url: https://gpt55.558686.xyz/buyer-guide
  - type: GettingStarted
    url: https://gpt55.558686.xyz/x402/guides/ai-agent-x402-api
  - type: Pricing
    url: https://gpt55.558686.xyz/pricing.json
  - type: Postman
    url: https://gpt55.558686.xyz/postman/collection.json
  - type: PostmanCollection
    url: postman/558686-xyz-gpt55-postman-collection.json
  - type: X402
    url: https://gpt55.558686.xyz/.well-known/x402
  - type: Examples
    url: examples/558686-xyz-standard-chat-example.json
  - type: Examples
    url: examples/558686-xyz-translate-canary-example.json
  - type: RateLimits
    url: rate-limits/558686-xyz-rate-limits.yml
  - type: ErrorCatalog
    url: errors/558686-xyz-problem-types.yml
  - type: Conventions
    url: conventions/558686-xyz-conventions.yml
  - type: Documentation
    url: https://gpt55.558686.xyz/api-market
  - type: Documentation
    url: https://sub2api.558686.xyz/docs/
  - type: GettingStarted
    url: https://sub2api.558686.xyz/docs/getting-started.html
  - type: Pricing
    url: https://sub2api.558686.xyz/pricing
  - type: Login
    url: https://sub2api.558686.xyz/login
  - type: APIsJson
    url: https://sub2api.558686.xyz/apis.json
  - type: LLMsTxt
    url: llms/558686-xyz-sub2api-llms.txt
  - type: Postman
    url: https://sub2api.558686.xyz/postman/sub2api.postman_collection.json
  - type: PostmanCollection
    url: postman/558686-xyz-sub2api-postman-collection.json
  - type: Authentication
    url: authentication/558686-xyz-authentication.yml
- aid: 558686-xyz:558686-xyz-wallet-security-api
  name: gpt55-token-gateway Wallet Security API
  description: The wallet-security API from gpt55-token-gateway — 1 operation(s) for wallet-security.
  humanURL: https://gpt55.558686.xyz/x402/service
  baseURL: https://gpt55.558686.xyz
  tags:
  - Wallet Security
  tags_raw:
  - wallet-security
  properties:
  - type: OpenAPI
    url: openapi/558686-xyz-wallet-security-api-openapi.yml
  - type: Documentation
    url: https://gpt55.558686.xyz/x402/guides/ai-agent-x402-api
  - type: APIReference
    url: https://gpt55.558686.xyz/buyer-guide
  - type: GettingStarted
    url: https://gpt55.558686.xyz/x402/guides/ai-agent-x402-api
  - type: Pricing
    url: https://gpt55.558686.xyz/pricing.json
  - type: Postman
    url: https://gpt55.558686.xyz/postman/collection.json
  - type: PostmanCollection
    url: postman/558686-xyz-gpt55-postman-collection.json
  - type: X402
    url: https://gpt55.558686.xyz/.well-known/x402
  - type: Examples
    url: examples/558686-xyz-standard-chat-example.json
  - type: Examples
    url: examples/558686-xyz-translate-canary-example.json
  - type: RateLimits
    url: rate-limits/558686-xyz-rate-limits.yml
  - type: ErrorCatalog
    url: errors/558686-xyz-problem-types.yml
  - type: Conventions
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  - type: Documentation
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  - type: GettingStarted
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  - type: Pricing
    url: https://sub2api.558686.xyz/pricing
  - type: Login
    url: https://sub2api.558686.xyz/login
  - type: APIsJson
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  - type: LLMsTxt
    url: llms/558686-xyz-sub2api-llms.txt
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    url: https://sub2api.558686.xyz/postman/sub2api.postman_collection.json
  - type: PostmanCollection
    url: postman/558686-xyz-sub2api-postman-collection.json
  - type: Authentication
    url: authentication/558686-xyz-authentication.yml
- aid: 558686-xyz:558686-xyz-wallet-signing-safety-pack-api
  name: gpt55-token-gateway Wallet Signing Safety Pack API
  description: >-
    The wallet-signing-safety-pack API from gpt55-token-gateway — 1 operation(s) for wallet-signing-safety-pack.
  humanURL: https://gpt55.558686.xyz/x402/service
  baseURL: https://gpt55.558686.xyz
  tags:
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  - type: APIReference
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  - type: GettingStarted
    url: https://gpt55.558686.xyz/x402/guides/ai-agent-x402-api
  - type: Pricing
    url: https://gpt55.558686.xyz/pricing.json
  - type: Postman
    url: https://gpt55.558686.xyz/postman/collection.json
  - type: PostmanCollection
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  - type: Examples
    url: examples/558686-xyz-translate-canary-example.json
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  name: gpt55-token-gateway X402 API
  description: The x402 API from gpt55-token-gateway — 1 operation(s) for x402.
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  - type: Examples
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    url: https://gpt55.558686.xyz/api-market
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    url: https://sub2api.558686.xyz/docs/
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  - type: Pricing
    url: https://sub2api.558686.xyz/pricing
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    url: postman/558686-xyz-sub2api-postman-collection.json
  - type: Authentication
    url: authentication/558686-xyz-authentication.yml
- aid: 558686-xyz:558686-xyz-chat-completions-api
  name: gpt55-token-gateway Chat Completions API
  description: The Chat Completions API from gpt55-token-gateway — 1 operation(s) for chat completions.
  humanURL: https://gpt55.558686.xyz/projects/558686/install
  baseURL: https://gpt55.558686.xyz/mcp
  tags:
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  properties:
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    url: openapi/558686-xyz-chat-completions-api-openapi.yml
  - type: Documentation
    url: https://gpt55.558686.xyz/x402/guides/ai-agent-x402-api
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  - type: GettingStarted
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    url: https://gpt55.558686.xyz/pricing.json
  - type: Postman
    url: https://gpt55.558686.xyz/postman/collection.json
  - type: PostmanCollection
    url: postman/558686-xyz-gpt55-postman-collection.json
  - type: X402
    url: https://gpt55.558686.xyz/.well-known/x402
  - type: Examples
    url: examples/558686-xyz-standard-chat-example.json
  - type: Examples
    url: examples/558686-xyz-translate-canary-example.json
  - type: RateLimits
    url: rate-limits/558686-xyz-rate-limits.yml
  - type: ErrorCatalog
    url: errors/558686-xyz-problem-types.yml
  - type: Conventions
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  - type: Documentation
    url: https://gpt55.558686.xyz/api-market
  - type: Documentation
    url: https://sub2api.558686.xyz/docs/
  - type: GettingStarted
    url: https://sub2api.558686.xyz/docs/getting-started.html
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    url: https://sub2api.558686.xyz/pricing
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  - type: PostmanCollection
    url: postman/558686-xyz-sub2api-postman-collection.json
  - type: Authentication
    url: authentication/558686-xyz-authentication.yml
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
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  url: capabilities/558686-xyz-capability-edges.yml
  name: gpt55-token-gateway Business Capability Map
- url: https://sub2api.558686.xyz/blog/
  type: Blog
- type: Overlay
  url: overlays/558686-xyz-api-market-utility-tools-overlay.yaml
- type: Overlay
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- type: Website
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- type: Pricing
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- type: PrivacyPolicy
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- type: GitHubRepository
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- type: GitHub
  name: GitHub account (individual user, not an organization)
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- type: Security
  url: https://github.com/wangletiand/gpt55-x402-gateway/blob/main/SECURITY.md
- type: VulnerabilityDisclosure
  url: security/558686-xyz-vulnerability-disclosure.yml
- type: StatusPage
  name: Settlement and facilitator status (JSON only)
  url: https://gpt55.558686.xyz/x402/status
- type: Deprecation
  name: Split-host retirement policy (projects/split.json)
  url: https://gpt55.558686.xyz/projects/split.json
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  url: lifecycle/558686-xyz-lifecycle.yml
- type: AgentCard
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- type: Packages
  url: packages/558686-xyz-packages.yml
- type: SDKs
  url: packages/558686-xyz-packages.yml
- type: Authentication
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- type: Conventions
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  url: conformance/558686-xyz-conformance.yml
- type: RateLimits
  url: rate-limits/558686-xyz-rate-limits.yml
- type: Plans
  url: plans/558686-xyz-plans-pricing.yml
- type: Sandbox
  url: sandbox/558686-xyz-sandbox.yml
- type: Examples
  url: examples/558686-xyz-standard-chat-example.json
- type: AgentSkill
  url: skills/_index.yml
- type: Overlay
  url: overlays/558686-xyz-gpt55-model-gateway-overlay.yaml
- type: DomainSecurity
  url: security/558686-xyz-domain-security.yml
x-enrichment:
  date: '2026-09-19'
  status: enriched
  artifacts_added: 50
  pass: local-v3
x-a2a:
  verified: true
  probed: '2026-09-26'
  url: "https://gpt55.558686.xyz/.well-known/agent-card.json"
  grade: "conformant"
  protocol_version: "1.0"
  control: 404