name: Blnk Finance aid: blnkfinance description: Open-source double-entry ledger for financial products (wallets, loans, payouts, escrow, cards). Available as self-hosted Blnk Core (OSS engine) and Blnk Cloud (managed), plus Blnk Watch for transaction monitoring. Exposes REST APIs with a public OpenAPI spec, hosted MCP servers, llms.txt, and installable agent skills. url: https://raw.githubusercontent.com/api-evangelist/open-source-ledger-for-financial-products-blnk-finance/refs/heads/main/apis.yml deliveryModel: model: saas open_source: false commercial: true callable_host: false label: Hosted service · you call their endpoint confidence: medium source: - pricing generated: '2026-08-28' method: derived accessModel: pricing: freemium onboarding: self-serve trial: false try_now: true public: false label: Freemium · Self-serve signup confidence: high source: - plans - authentication - scopes - rate-limits - security - sandbox generated: '2026-09-02' method: derived created: '2026-08-26' modified: '2026-08-27' specificationVersion: '0.21' x-docs-platform: mintlify x-docs-platform-confidence: medium x-docs-platform-checked: 2026-09-20 x-docs-hosting: vercel tags: - Fintech - Financial Services - Ledger - Double-Entry - Payments - Wallets - Lending - Banking Infrastructure - Open Source - MCP - AI Agents - Developer Tools - A2A tags_raw: - fintech - financial-services - ledger - double-entry-accounting - payments - wallets - lending - banking-infrastructure - open-source - mcp - ai-agents - developer-tools - Financial-Services - Open-Source - A2A apis: - name: Blnk Cloud API description: >- Managed Cloud REST surface covering OAuth auth, a Proxy API to a Core instance, Data API, Filters API, Alerts API, and the MCP endpoint. Auth via API keys or OAuth. humanURL: https://docs.blnkfinance.com/cloud/reference/overview.md baseURL: https://api.cloud.blnkfinance.com tags: - Fintech - Financial Services - Ledger - Double-Entry - Payments - Wallets - Lending - Banking Infrastructure - Open Source - MCP - AI Agents - Developer Tools tags_raw: - fintech - financial-services - ledger - double-entry-accounting - payments - wallets - lending - banking-infrastructure - open-source - mcp - ai-agents - developer-tools - Financial-Services - Open-Source properties: - type: Documentation url: https://docs.blnkfinance.com/cloud/reference/overview.md - type: MCPServer url: https://docs.blnkfinance.com/mcp description: >- Open, no-auth Mintlify DOCUMENTATION-SEARCH MCP on a first-party host. Probed live 2026-08-27: initialize + tools/list returned 200, serverInfo "Blnk Finance", protocolVersion 2025-11-25, 3 tools. It is NOT the ledger MCP -- that is https://api.cloud.blnkfinance.com/mcp/{instance_id}. - type: LLMsTxt url: https://blnkfinance.com/llms.txt - type: LLMsTxt url: https://docs.blnkfinance.com/llms.txt - type: AgentSkill url: https://docs.blnkfinance.com/home/llms.md description: >- Blnk's "Build with LLMs" page: documents installing the 14 provider-authored Agent Skills via "npx skills add https://docs.blnkfinance.com". Verified 200 on 2026-08-27. - type: APIReference url: https://docs.blnkfinance.com/cloud/reference/overview - type: MCPServer url: mcp/blnkfinance-mcp.yml description: >- Cloud ledger MCP: https://api.cloud.blnkfinance.com/mcp/{instance_id}, 33 tools, Bearer + mcp:read/mcp:write. - type: ToolCrosswalk url: mcp/blnkfinance-tool-crosswalk.yml - type: OAuthScopes url: scopes/blnkfinance-scopes.yml - type: AgentSkill url: skills/_index.yml - name: Blnk Watch API description: >- Rule-based transaction monitoring API (transaction evaluation, instruction management, Git-backed rule sync). Beta. humanURL: https://docs.blnkfinance.com/watch/reference/overview.md baseURL: https://api.cloud.blnkfinance.com tags: - Fintech - Financial Services - Ledger - Double-Entry - Payments - Wallets - Lending - Banking Infrastructure - Open Source - MCP - AI Agents - Developer Tools tags_raw: - fintech - financial-services - ledger - double-entry-accounting - payments - wallets - lending - banking-infrastructure - open-source - mcp - ai-agents - developer-tools - Financial-Services - Open-Source properties: - type: Documentation url: https://docs.blnkfinance.com/watch/reference/overview.md - type: APIReference url: https://docs.blnkfinance.com/watch/reference/overview - aid: blnkfinance:blnkfinance-accounts-api name: Blnk Finance Accounts API description: The Accounts API from Blnk Finance — 2 operation(s) for accounts. humanURL: https://docs.blnkfinance.com/reference/overview.md baseURL: http://localhost:5001 tags: - Account tags_raw: - Accounts properties: - type: OpenAPI url: openapi/blnkfinance-accounts-api-openapi.yml - type: Documentation url: https://docs.blnkfinance.com/reference/overview.md - type: LLMsTxt url: https://blnkfinance.com/llms.txt - type: LLMsTxt url: https://docs.blnkfinance.com/llms.txt - type: APIReference url: https://docs.blnkfinance.com/reference/overview - type: DataModel url: data-model/blnkfinance-data-model.yml - type: Webhooks url: asyncapi/blnkfinance-webhooks.yml - type: ErrorCatalog url: errors/blnkfinance-error-codes.yml - aid: blnkfinance:blnkfinance-backup-api name: Blnk Finance Backup API description: The Backup API from Blnk Finance — 2 operation(s) for backup. humanURL: https://docs.blnkfinance.com/reference/overview.md baseURL: http://localhost:5001 tags: - Backup properties: - type: OpenAPI url: openapi/blnkfinance-backup-api-openapi.yml - type: Documentation url: https://docs.blnkfinance.com/reference/overview.md - type: LLMsTxt url: https://blnkfinance.com/llms.txt - type: LLMsTxt url: https://docs.blnkfinance.com/llms.txt - type: APIReference url: https://docs.blnkfinance.com/reference/overview - type: DataModel url: data-model/blnkfinance-data-model.yml - type: Webhooks url: asyncapi/blnkfinance-webhooks.yml - type: ErrorCatalog url: errors/blnkfinance-error-codes.yml - aid: blnkfinance:blnkfinance-balance-monitors-api name: Blnk Finance Balance Monitors API description: The Balance Monitors API from Blnk Finance — 2 operation(s) for balance monitors. humanURL: https://docs.blnkfinance.com/reference/overview.md baseURL: http://localhost:5001 tags: - Balance Monitors properties: - type: OpenAPI url: openapi/blnkfinance-balance-monitors-api-openapi.yml - type: Documentation url: https://docs.blnkfinance.com/reference/overview.md - type: LLMsTxt url: https://blnkfinance.com/llms.txt - type: LLMsTxt url: https://docs.blnkfinance.com/llms.txt - type: APIReference url: https://docs.blnkfinance.com/reference/overview - type: DataModel url: data-model/blnkfinance-data-model.yml - type: Webhooks url: asyncapi/blnkfinance-webhooks.yml - type: ErrorCatalog url: errors/blnkfinance-error-codes.yml - aid: blnkfinance:blnkfinance-balances-api name: Blnk Finance Balances API description: The Balances API from Blnk Finance — 2 operation(s) for balances. humanURL: https://docs.blnkfinance.com/reference/overview.md baseURL: http://localhost:5001 tags: - Balances properties: - type: OpenAPI url: openapi/blnkfinance-balances-api-openapi.yml - type: Documentation url: https://docs.blnkfinance.com/reference/overview.md - type: LLMsTxt url: https://blnkfinance.com/llms.txt - type: LLMsTxt url: https://docs.blnkfinance.com/llms.txt - type: APIReference url: https://docs.blnkfinance.com/reference/overview - type: DataModel url: data-model/blnkfinance-data-model.yml - type: Webhooks url: asyncapi/blnkfinance-webhooks.yml - type: ErrorCatalog url: errors/blnkfinance-error-codes.yml - aid: blnkfinance:blnkfinance-identities-api name: Blnk Finance Identities API description: The Identities API from Blnk Finance — 2 operation(s) for identities. humanURL: https://docs.blnkfinance.com/reference/overview.md baseURL: http://localhost:5001 tags: - Identities properties: - type: OpenAPI url: openapi/blnkfinance-identities-api-openapi.yml - type: Documentation url: https://docs.blnkfinance.com/reference/overview.md - type: LLMsTxt url: https://blnkfinance.com/llms.txt - type: LLMsTxt url: https://docs.blnkfinance.com/llms.txt - type: APIReference url: https://docs.blnkfinance.com/reference/overview - type: DataModel url: data-model/blnkfinance-data-model.yml - type: Webhooks url: asyncapi/blnkfinance-webhooks.yml - type: ErrorCatalog url: errors/blnkfinance-error-codes.yml - aid: blnkfinance:blnkfinance-ledgers-api name: Blnk Finance Ledgers API description: The Ledgers API from Blnk Finance — 2 operation(s) for ledgers. humanURL: https://docs.blnkfinance.com/reference/overview.md baseURL: http://localhost:5001 tags: - Ledgers properties: - type: OpenAPI url: openapi/blnkfinance-ledgers-api-openapi.yml - type: Documentation url: https://docs.blnkfinance.com/reference/overview.md - type: LLMsTxt url: https://blnkfinance.com/llms.txt - type: LLMsTxt url: https://docs.blnkfinance.com/llms.txt - type: APIReference url: https://docs.blnkfinance.com/reference/overview - type: DataModel url: data-model/blnkfinance-data-model.yml - type: Webhooks url: asyncapi/blnkfinance-webhooks.yml - type: ErrorCatalog url: errors/blnkfinance-error-codes.yml - aid: blnkfinance:blnkfinance-refund-transaction-api name: Blnk Finance Refund Transaction API description: The Refund Transaction API from Blnk Finance — 1 operation(s) for refund transaction. humanURL: https://docs.blnkfinance.com/reference/overview.md baseURL: http://localhost:5001 tags: - Refund Transaction properties: - type: OpenAPI url: openapi/blnkfinance-refund-transaction-api-openapi.yml - type: Documentation url: https://docs.blnkfinance.com/reference/overview.md - type: LLMsTxt url: https://blnkfinance.com/llms.txt - type: LLMsTxt url: https://docs.blnkfinance.com/llms.txt - type: APIReference url: https://docs.blnkfinance.com/reference/overview - type: DataModel url: data-model/blnkfinance-data-model.yml - type: Webhooks url: asyncapi/blnkfinance-webhooks.yml - type: ErrorCatalog url: errors/blnkfinance-error-codes.yml - aid: blnkfinance:blnkfinance-transactions-api name: Blnk Finance Transactions API description: The Transactions API from Blnk Finance — 2 operation(s) for transactions. humanURL: https://docs.blnkfinance.com/reference/overview.md baseURL: http://localhost:5001 tags: - Transaction tags_raw: - Transactions properties: - type: OpenAPI url: openapi/blnkfinance-transactions-api-openapi.yml - type: Documentation url: https://docs.blnkfinance.com/reference/overview.md - type: LLMsTxt url: https://blnkfinance.com/llms.txt - type: LLMsTxt url: https://docs.blnkfinance.com/llms.txt - type: APIReference url: https://docs.blnkfinance.com/reference/overview - type: DataModel url: data-model/blnkfinance-data-model.yml - type: Webhooks url: asyncapi/blnkfinance-webhooks.yml - type: ErrorCatalog url: errors/blnkfinance-error-codes.yml maintainers: - FN: Blnk Finance url: https://blnkfinance.com email: support@blnkfinance.com generated: by: apis.io/add model: claude-opus-4-8 confidence: 95 at: '2026-08-26T22:58:17.366Z' common: - type: CapabilityMap url: capabilities/blnkfinance-capability-edges.yml name: Blnk Finance Business Capability Map - type: Website url: https://www.blnkfinance.com/ - type: DomainSecurity url: security/blnkfinance-domain-security.yml - type: Authentication url: authentication/blnkfinance-authentication.yml - type: DeveloperPortal url: https://docs.blnkfinance.com/ description: Blnk developer documentation hub. Verified 200 on 2026-08-27. - type: Documentation url: https://docs.blnkfinance.com/ description: Verified 200 on 2026-08-27. - type: APIReference url: https://docs.blnkfinance.com/reference/overview description: Blnk Core REST reference. Verified 200 on 2026-08-27. - type: GettingStarted url: https://docs.blnkfinance.com/home/install description: Install Blnk Core (Docker Compose) or start a Cloud Sandbox. Verified 200 on 2026-08-27. - type: Support url: https://blnkfinance.com/contact/us description: Contact / book a demo; support@blnkfinance.com and Discord https://discord.gg/7WNv94zPpx. Verified 200 on 2026-08-27. - type: Blog url: https://blnkfinance.com/blog description: Verified 200 on 2026-08-27. No RSS/Atom feed served (/rss.xml and /feed.xml both 404). - type: GitHubOrganization url: https://github.com/blnkfinance description: '9 public repos: blnk (Core), watch, blnk-docs, and the four SDKs. Verified 200 on 2026-08-27.' - type: Pricing url: https://blnkfinance.com/pricing description: Verified 200 on 2026-08-27. - type: SignUp url: https://cloud.blnkfinance.com/auth/sign-up description: Blnk Cloud sign-up, 5-day Sandbox trial. Verified 200 on 2026-08-27. - type: TermsOfService url: https://blnkfinance.com/legal/terms description: Verified 200 on 2026-08-27. - type: PrivacyPolicy url: https://blnkfinance.com/legal/privacy description: Verified 200 on 2026-08-27. - type: StatusPage url: https://status.blnkfinance.com/ description: Atlassian Statuspage, all components operational. Verified 200 on 2026-08-27. - type: Packages url: packages/blnkfinance-packages.yml - type: SDKs url: packages/blnkfinance-packages.yml description: Four first-party SDKs -- TypeScript, Go, Python, Java -- all at 1.3.0. - type: CLI url: cli/blnkfinance-cli.yml description: '@blnkfinance/blnk-cli 1.8.3, npm.' - type: WellKnown url: well-known/blnkfinance-well-known.yml description: 'Real hits: RFC 8414 OAuth metadata + openid-configuration on api.cloud.blnkfinance.com, and an MCP discovery document on docs.blnkfinance.com.' - type: AgentCard url: a2a/blnkfinance-a2a.yml description: Live A2A agent card at docs.blnkfinance.com/.well-known/agent-card.json (HTTP 200, 14 skills). Graded flavored against A2A 1.0.0. - type: AgentSkill url: skills/_index.yml description: 14 provider-authored Agent Skills, saved verbatim from /.well-known/agent-skills//skill.md. - type: LLMsTxt url: llms/blnkfinance-llms.txt description: Verbatim copy of https://blnkfinance.com/llms.txt. - type: Overlay url: overlays/blnkfinance-core-overlay.yaml - type: Conformance url: conformance/blnkfinance-conformance.yml - type: Compliance url: conformance/blnkfinance-conformance.yml description: ISO/IEC 27001 certified ISMS and GDPR compliance, published at https://blnkfinance.com/security. - type: ErrorCatalog url: errors/blnkfinance-error-codes.yml description: 72 stable domain-prefixed error codes from https://docs.blnkfinance.com/advanced/error-codes. - type: Lifecycle url: lifecycle/blnkfinance-lifecycle.yml - type: Deprecation url: lifecycle/blnkfinance-lifecycle.yml description: Per-release migration guides for every breaking change plus a published upgrade policy. No RFC 8594 Sunset/Deprecation headers. - type: OAuthScopes url: scopes/blnkfinance-scopes.yml description: resource:action API key scopes plus the Cloud OAuth mcp:read / mcp:write scopes. - type: VulnerabilityDisclosure url: security/blnkfinance-vulnerability-disclosure.yml - type: Security url: security/blnkfinance-vulnerability-disclosure.yml description: Coordinated disclosure to security@blnkfinance.com, CVSS 4.0+ threshold, scoped program at https://blnkfinance.com/report-vulnerability. - type: TrustCenter url: security/blnkfinance-trust-center.yml - type: Sandbox url: sandbox/blnkfinance-sandbox.yml description: Free local Core via Docker Compose, plus a paid managed Cloud Sandbox with a 5-day trial. - type: Conventions url: conventions/blnkfinance-conventions.yml - type: Idempotency url: conventions/blnkfinance-conventions.yml description: Caller-supplied transaction `reference` with a unique database index since Core 0.13.2; duplicates rejected 409 TXN_DUPLICATE_REFERENCE. - type: ChangeLog url: changelog/blnkfinance-changelog.yml description: Six dated changelogs -- Core, Cloud, Watch, CLI and four SDKs. - type: DataModel url: data-model/blnkfinance-data-model.yml - type: Webhooks url: asyncapi/blnkfinance-webhooks.yml description: 15 documented events, HMAC-SHA256 signed with X-Blnk-Signature since Core 0.13.0. No AsyncAPI document published. - type: Plans url: plans/blnkfinance-plans-pricing.yml - type: RateLimits url: rate-limits/blnkfinance-rate-limits.yml - type: MCPServer url: mcp/blnkfinance-mcp.yml description: 'Two servers: the Cloud ledger MCP (33 tools, remote, OAuth/API-key gated) and the open docs-search MCP (3 tools, probed live).' - type: ToolCrosswalk url: mcp/blnkfinance-tool-crosswalk.yml description: 33 MCP tools bound against the 18 published OpenAPI operations; 12 bound, 21 MCP-only, 8 REST-only. - type: Contact url: mailto:sales@blnkfinance.com image: https://blnkfinance.com/_astro/og-default.4FpZOtzr.png x-enrichment: date: '2026-08-27' status: enriched artifacts_added: 45 pass: local-v1 x-a2a: verified: true probed: '2026-09-26' url: "https://docs.blnkfinance.com/.well-known/agent-card.json" grade: "conformant" protocol_version: "0.3" control: 404