aid: s2-dev
name: S2 Dev
description: >-
  S2 ("Stream Store") is the API for unlimited, durable, real-time streams.
  Where object storage deals with blobs, S2 provides append-able, ordered
  record streams that can be tailed in real time and replayed from any retained
  point. Core data-plane operations are append, read, and check-tail; the
  control plane manages accounts, basins (stream namespaces), streams, scoped
  access tokens, locations, and metrics. It targets agent session logs, live
  views and build logs, event sourcing and sync, data feeds, resumable LLM
  token streaming, and observability. Access is over a REST/JSON + Protobuf HTTP
  API, an S2S binary protocol over HTTP/2, SSE tailing, first-party TypeScript,
  Python, Go, and Rust SDKs, a CLI, and a Terraform provider. S2 is a Y
  Combinator-backed company.
url: https://raw.githubusercontent.com/api-evangelist/s2-dev/refs/heads/main/apis.yml
x-type: company
x-source: vc-portfolio
x-backed-by:
- y-combinator
x-tier: stub
x-tier-reason: portfolio-lead
deliveryModel:
  model: saas
  open_source: false
  commercial: true
  callable_host: true
  label: Hosted service · you call their endpoint
  confidence: high
  source:
  - openapi
  - pricing
  generated: '2026-08-28'
  method: derived
accessModel:
  pricing: unknown
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Unknown
  confidence: low
  source:
  - authentication
  - rate-limits
  - security
  - sandbox
  generated: '2026-09-03'
  method: derived
specificationVersion: '0.23'
created: '2026-07-17'
modified: '2026-10-06'
image: https://avatars.githubusercontent.com/u/136030139?v=4
tags:
- Company
- Streaming
- Real-Time
- Event Streaming
- Durable Storage
- Message Streaming
- Data Feed
- Observability
- Developer Tools
- Infrastructure
tags_raw:
- Company
- Streaming
- Real-Time
- Event Streaming
- Durable Storage
- Message Streaming
- Data Feeds
- Observability
- Developer Tools
- Infrastructure
apis:
- aid: s2-dev:s2-dev-access-tokens-api
  name: S2 Dev Access Tokens API
  description: Manage access tokens
  humanURL: https://s2.dev/docs/api
  baseURL: https://a.s2.dev/v1
  tags:
  - Access Tokens
  tags_raw:
  - access-tokens
  properties:
  - type: OpenAPI
    url: openapi/s2-dev-access-tokens-api-openapi.yml
  - type: Protobuf
    url: grpc/s2-dev-s2.proto
- aid: s2-dev:s2-dev-basins-api
  name: S2 Dev Basins API
  description: Manage basins
  humanURL: https://s2.dev/docs/api
  baseURL: https://a.s2.dev/v1
  tags:
  - Basins
  tags_raw:
  - basins
  properties:
  - type: OpenAPI
    url: openapi/s2-dev-basins-api-openapi.yml
  - type: Protobuf
    url: grpc/s2-dev-s2.proto
- aid: s2-dev:s2-dev-locations-api
  name: S2 Dev Locations API
  description: Manage locations
  humanURL: https://s2.dev/docs/api
  baseURL: https://a.s2.dev/v1
  tags:
  - Location
  tags_raw:
  - locations
  properties:
  - type: OpenAPI
    url: openapi/s2-dev-locations-api-openapi.yml
  - type: Protobuf
    url: grpc/s2-dev-s2.proto
- aid: s2-dev:s2-dev-metrics-api
  name: S2 Dev Metrics API
  description: Usage metrics and data.
  humanURL: https://s2.dev/docs/api
  baseURL: https://a.s2.dev/v1
  tags:
  - Metrics
  tags_raw:
  - metrics
  properties:
  - type: OpenAPI
    url: openapi/s2-dev-metrics-api-openapi.yml
  - type: Protobuf
    url: grpc/s2-dev-s2.proto
- aid: s2-dev:s2-dev-records-api
  name: S2 Dev Records API
  description: Manage records
  humanURL: https://s2.dev/docs/api
  baseURL: https://a.s2.dev/v1
  tags:
  - Records
  tags_raw:
  - records
  properties:
  - type: OpenAPI
    url: openapi/s2-dev-records-api-openapi.yml
  - type: Protobuf
    url: grpc/s2-dev-s2.proto
- aid: s2-dev:s2-dev-streams-api
  name: S2 Dev Streams API
  description: Manage streams
  humanURL: https://s2.dev/docs/api
  baseURL: https://a.s2.dev/v1
  tags:
  - Streams
  tags_raw:
  - streams
  properties:
  - type: OpenAPI
    url: openapi/s2-dev-streams-api-openapi.yml
  - type: Protobuf
    url: grpc/s2-dev-s2.proto
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
x-enrichment:
  date: '2026-07-21'
  status: enriched
  artifacts_added: 26
  pass: local-v1
common:
- type: CapabilityMap
  url: capabilities/s2-dev-capability-edges.yml
  name: S2 Dev Business Capability Map
- type: Plans
  url: plans/s2-dev-plans-pricing.yml
- type: PostmanWorkspace
  url: https://www.postman.com/kinlaneapi/s2-dev/overview
- url: https://s2.dev/blog/feed.xml
  type: BlogRSS
- type: Website
  url: https://www.s2.dev/
- type: VulnerabilityDisclosure
  url: security/s2-dev-vulnerability-disclosure.yml
- type: DomainSecurity
  url: security/s2-dev-domain-security.yml
- type: AgenticAccess
  url: agentic-access/s2-dev-agentic-access.yml
- type: Authentication
  url: authentication/s2-dev-authentication.yml
- type: Security
  url: https://s2.dev/docs/platform/security
- type: TrustCenter
  url: security/s2-dev-trust-center.yml
- type: Compliance
  url: https://s2.dev/docs/platform/security
- type: DeveloperPortal
  url: https://s2.dev/docs
- type: Documentation
  url: https://s2.dev/docs
- type: APIReference
  url: https://s2.dev/docs/api
- type: GettingStarted
  url: https://s2.dev/docs/quickstart
- type: Support
  url: mailto:hi@s2.dev
- type: Blog
  url: https://s2.dev/blog
- type: GitHubOrganization
  url: https://github.com/s2-streamstore
- type: Pricing
  url: https://s2.dev/pricing
- type: SignUp
  url: https://s2.dev/dashboard
- type: TermsOfService
  url: https://s2.dev/terms
- type: PrivacyPolicy
  url: https://s2.dev/privacy
- type: StatusPage
  url: https://status.s2.dev
- type: Packages
  url: packages/s2-dev-packages.yml
- type: SDKs
  url: packages/s2-dev-packages.yml
- type: CLI
  url: cli/s2-dev-cli.yml
- type: Sandbox
  url: sandbox/s2-dev-sandbox.yml
- type: ChangeLog
  url: changelog/s2-dev-changelog.yml
- type: Lifecycle
  url: lifecycle/s2-dev-lifecycle.yml
- type: RateLimits
  url: rate-limits/s2-dev-rate-limits.yml
- type: Conventions
  url: conventions/s2-dev-conventions.yml
- type: Idempotency
  url: conventions/s2-dev-conventions.yml
- type: ErrorCatalog
  url: errors/s2-dev-problem-types.yml
- type: DataModel
  url: data-model/s2-dev-data-model.yml
- type: Conformance
  url: conformance/s2-dev-conformance.yml
- type: WellKnown
  url: well-known/s2-dev-well-known.yml
- type: SecurityTxt
  url: well-known/s2-dev-security.txt
- type: APICatalog
  url: well-known/s2-dev-api-catalog.json
- type: LLMsTxt
  url: llms/s2-dev-llms.txt
- type: Overlay
  url: overlays/s2-dev-openapi-overlay.yaml
- type: X-MCPServerCandidate
  url: mcp/s2-dev-mcp.yml
  note: 'Renamed from MCPServer 2026-09-03 (roadmap#247): the manifest self-describes as status: candidate — a tool list derived from the published API contracts, not an existing server. The scorer already read the manifest and reported mcp_server correctly; the MCPServer type was crediting the artifact-type surfaces with a server that does not exist.'
- type: AgentSkill
  url: skills/_index.yml