aid: frankfurter deliveryModel: model: open-core license: MIT license_evidence: repo: lineofflight/frankfurter spdx: MIT stars: 1899 open_source: true commercial: true callable_host: true label: Open core · an OSS project plus a commercial hosted product confidence: medium source: - openapi - pricing - repository-license generated: '2026-09-25' method: derived accessModel: pricing: freemium onboarding: open trial: false try_now: true public: true label: Freemium · Open access confidence: medium source: - plans generated: '2026-07-22' method: derived image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/frankfurter.png name: Frankfurter description: >- Frankfurter is an open-source (MIT) currency exchange rates API that blends foreign-exchange reference rates published by 50+ central banks and monetary authorities. It hosts a free, no-key public endpoint at api.frankfurter.dev (current v2 and frozen v1) and ships as a Docker image for unlimited self-hosting. Historical data extends back to 1948 and covers 201 currencies; the API serves JSON, NDJSON, and CSV. url: https://frankfurter.dev specificationVersion: '0.23' created: '2026-05-28' modified: '2026-05-29' x-source: public-apis/public-apis x-type: opensource x-category: Currency Exchange x-tier: 2 x-tier-reason: Open-source, MIT-licensed, self-hostable; reconciled against upstream OpenAPI specs and lineofflight GitHub org. tags: - Foreign Exchange - Open Source - MIT - Self-Hosted - Public APIs - Exchange Rates tags_raw: - Currency Exchange - Foreign Exchange - FX - Open Source - MIT - Self-Hosted - Public APIs - Open-Source - Exchange Rates apis: - aid: frankfurter:frankfurter-currencies-api name: Frankfurter Currencies API description: Supported currency reference data humanURL: https://frankfurter.dev/docs baseURL: https://api.frankfurter.dev/v2 tags: - Currency tags_raw: - Currencies properties: - type: OpenAPI url: openapi/frankfurter-currencies-api-openapi.yml - type: Documentation url: https://frankfurter.dev/docs - type: JSONSchema url: json-schema/v2-rate-schema.json - type: JSONSchema url: json-schema/v2-currency-schema.json - type: JSONSchema url: json-schema/v2-currency-detail-schema.json - type: JSONSchema url: json-schema/v2-provider-schema.json - type: JSONStructure url: json-structure/v2-rate-structure.json - type: JSONStructure url: json-structure/v2-currency-structure.json - type: JSONStructure url: json-structure/v2-currency-detail-structure.json - type: JSONStructure url: json-structure/v2-provider-structure.json - type: JSONLD url: json-ld/frankfurter-v2-context.jsonld - type: Examples url: examples/v2-rate-example.json - type: Examples url: examples/v2-currency-example.json - type: Examples url: examples/v2-currency-detail-example.json - type: Examples url: examples/v2-provider-example.json - type: JSONSchema url: json-schema/v1-rates-on-date-schema.json - type: JSONSchema url: json-schema/v1-rates-by-date-schema.json - type: JSONSchema url: json-schema/v1-rates-schema.json - type: JSONSchema url: json-schema/v1-currencies-schema.json - type: JSONSchema url: json-schema/v1-amount-schema.json - type: JSONSchema url: json-schema/v1-base-schema.json - type: JSONSchema url: json-schema/v1-base-in-schema.json - type: JSONSchema url: json-schema/v1-date-schema.json - type: JSONStructure url: json-structure/v1-rates-on-date-structure.json - type: JSONStructure url: json-structure/v1-rates-by-date-structure.json - type: JSONStructure url: json-structure/v1-rates-structure.json - type: JSONStructure url: json-structure/v1-currencies-structure.json - type: JSONStructure url: json-structure/v1-amount-structure.json - type: JSONStructure url: json-structure/v1-base-structure.json - type: JSONStructure url: json-structure/v1-base-in-structure.json - type: JSONStructure url: json-structure/v1-date-structure.json - type: JSONLD url: json-ld/frankfurter-v1-context.jsonld - type: Examples url: examples/v1-rates-on-date-example.json - type: Examples url: examples/v1-rates-by-date-example.json - type: Examples url: examples/v1-currencies-example.json - aid: frankfurter:frankfurter-current-rates-api name: Frankfurter Current Rates API description: Latest foreign exchange rates humanURL: https://frankfurter.dev/docs baseURL: https://api.frankfurter.dev/v2 tags: - current-rates properties: - type: OpenAPI url: openapi/frankfurter-current-rates-api-openapi.yml - type: Documentation url: https://frankfurter.dev/docs - type: JSONSchema url: json-schema/v2-rate-schema.json - type: JSONSchema url: json-schema/v2-currency-schema.json - type: JSONSchema url: json-schema/v2-currency-detail-schema.json - type: JSONSchema url: json-schema/v2-provider-schema.json - type: JSONStructure url: json-structure/v2-rate-structure.json - type: JSONStructure url: json-structure/v2-currency-structure.json - type: JSONStructure url: json-structure/v2-currency-detail-structure.json - type: JSONStructure url: json-structure/v2-provider-structure.json - type: JSONLD url: json-ld/frankfurter-v2-context.jsonld - type: Examples url: examples/v2-rate-example.json - type: Examples url: examples/v2-currency-example.json - type: Examples url: examples/v2-currency-detail-example.json - type: Examples url: examples/v2-provider-example.json - type: JSONSchema url: json-schema/v1-rates-on-date-schema.json - type: JSONSchema url: json-schema/v1-rates-by-date-schema.json - type: JSONSchema url: json-schema/v1-rates-schema.json - type: JSONSchema url: json-schema/v1-currencies-schema.json - type: JSONSchema url: json-schema/v1-amount-schema.json - type: JSONSchema url: json-schema/v1-base-schema.json - type: JSONSchema url: json-schema/v1-base-in-schema.json - type: JSONSchema url: json-schema/v1-date-schema.json - type: JSONStructure url: json-structure/v1-rates-on-date-structure.json - type: JSONStructure url: json-structure/v1-rates-by-date-structure.json - type: JSONStructure url: json-structure/v1-rates-structure.json - type: JSONStructure url: json-structure/v1-currencies-structure.json - type: JSONStructure url: json-structure/v1-amount-structure.json - type: JSONStructure url: json-structure/v1-base-structure.json - type: JSONStructure url: json-structure/v1-base-in-structure.json - type: JSONStructure url: json-structure/v1-date-structure.json - type: JSONLD url: json-ld/frankfurter-v1-context.jsonld - type: Examples url: examples/v1-rates-on-date-example.json - type: Examples url: examples/v1-rates-by-date-example.json - type: Examples url: examples/v1-currencies-example.json - aid: frankfurter:frankfurter-historical-rates-api name: Frankfurter Historical Rates API description: Historical exchange rates for specific dates and periods humanURL: https://frankfurter.dev/docs baseURL: https://api.frankfurter.dev/v2 tags: - Historical Rates tags_raw: - historical-rates properties: - type: OpenAPI url: openapi/frankfurter-historical-rates-api-openapi.yml - type: Documentation url: https://frankfurter.dev/docs - type: JSONSchema url: json-schema/v2-rate-schema.json - type: JSONSchema url: json-schema/v2-currency-schema.json - type: JSONSchema url: json-schema/v2-currency-detail-schema.json - type: JSONSchema url: json-schema/v2-provider-schema.json - type: JSONStructure url: json-structure/v2-rate-structure.json - type: JSONStructure url: json-structure/v2-currency-structure.json - type: JSONStructure url: json-structure/v2-currency-detail-structure.json - type: JSONStructure url: json-structure/v2-provider-structure.json - type: JSONLD url: json-ld/frankfurter-v2-context.jsonld - type: Examples url: examples/v2-rate-example.json - type: Examples url: examples/v2-currency-example.json - type: Examples url: examples/v2-currency-detail-example.json - type: Examples url: examples/v2-provider-example.json - type: JSONSchema url: json-schema/v1-rates-on-date-schema.json - type: JSONSchema url: json-schema/v1-rates-by-date-schema.json - type: JSONSchema url: json-schema/v1-rates-schema.json - type: JSONSchema url: json-schema/v1-currencies-schema.json - type: JSONSchema url: json-schema/v1-amount-schema.json - type: JSONSchema url: json-schema/v1-base-schema.json - type: JSONSchema url: json-schema/v1-base-in-schema.json - type: JSONSchema url: json-schema/v1-date-schema.json - type: JSONStructure url: json-structure/v1-rates-on-date-structure.json - type: JSONStructure url: json-structure/v1-rates-by-date-structure.json - type: JSONStructure url: json-structure/v1-rates-structure.json - type: JSONStructure url: json-structure/v1-currencies-structure.json - type: JSONStructure url: json-structure/v1-amount-structure.json - type: JSONStructure url: json-structure/v1-base-structure.json - type: JSONStructure url: json-structure/v1-base-in-structure.json - type: JSONStructure url: json-structure/v1-date-structure.json - type: JSONLD url: json-ld/frankfurter-v1-context.jsonld - type: Examples url: examples/v1-rates-on-date-example.json - type: Examples url: examples/v1-rates-by-date-example.json - type: Examples url: examples/v1-currencies-example.json - aid: frankfurter:frankfurter-metadata-api name: Frankfurter Metadata API description: API reference data like available currencies humanURL: https://frankfurter.dev/docs baseURL: https://api.frankfurter.dev/v2 tags: - Metadata tags_raw: - metadata properties: - type: OpenAPI url: openapi/frankfurter-metadata-api-openapi.yml - type: Documentation url: https://frankfurter.dev/docs - type: JSONSchema url: json-schema/v2-rate-schema.json - type: JSONSchema url: json-schema/v2-currency-schema.json - type: JSONSchema url: json-schema/v2-currency-detail-schema.json - type: JSONSchema url: json-schema/v2-provider-schema.json - type: JSONStructure url: json-structure/v2-rate-structure.json - type: JSONStructure url: json-structure/v2-currency-structure.json - type: JSONStructure url: json-structure/v2-currency-detail-structure.json - type: JSONStructure url: json-structure/v2-provider-structure.json - type: JSONLD url: json-ld/frankfurter-v2-context.jsonld - type: Examples url: examples/v2-rate-example.json - type: Examples url: examples/v2-currency-example.json - type: Examples url: examples/v2-currency-detail-example.json - type: Examples url: examples/v2-provider-example.json - type: JSONSchema url: json-schema/v1-rates-on-date-schema.json - type: JSONSchema url: json-schema/v1-rates-by-date-schema.json - type: JSONSchema url: json-schema/v1-rates-schema.json - type: JSONSchema url: json-schema/v1-currencies-schema.json - type: JSONSchema url: json-schema/v1-amount-schema.json - type: JSONSchema url: json-schema/v1-base-schema.json - type: JSONSchema url: json-schema/v1-base-in-schema.json - type: JSONSchema url: json-schema/v1-date-schema.json - type: JSONStructure url: json-structure/v1-rates-on-date-structure.json - type: JSONStructure url: json-structure/v1-rates-by-date-structure.json - type: JSONStructure url: json-structure/v1-rates-structure.json - type: JSONStructure url: json-structure/v1-currencies-structure.json - type: JSONStructure url: json-structure/v1-amount-structure.json - type: JSONStructure url: json-structure/v1-base-structure.json - type: JSONStructure url: json-structure/v1-base-in-structure.json - type: JSONStructure url: json-structure/v1-date-structure.json - type: JSONLD url: json-ld/frankfurter-v1-context.jsonld - type: Examples url: examples/v1-rates-on-date-example.json - type: Examples url: examples/v1-rates-by-date-example.json - type: Examples url: examples/v1-currencies-example.json - aid: frankfurter:frankfurter-providers-api name: Frankfurter Providers API description: Central-bank and institutional data providers humanURL: https://frankfurter.dev/docs baseURL: https://api.frankfurter.dev/v2 tags: - Providers properties: - type: OpenAPI url: openapi/frankfurter-providers-api-openapi.yml - type: Documentation url: https://frankfurter.dev/docs - type: JSONSchema url: json-schema/v2-rate-schema.json - type: JSONSchema url: json-schema/v2-currency-schema.json - type: JSONSchema url: json-schema/v2-currency-detail-schema.json - type: JSONSchema url: json-schema/v2-provider-schema.json - type: JSONStructure url: json-structure/v2-rate-structure.json - type: JSONStructure url: json-structure/v2-currency-structure.json - type: JSONStructure url: json-structure/v2-currency-detail-structure.json - type: JSONStructure url: json-structure/v2-provider-structure.json - type: JSONLD url: json-ld/frankfurter-v2-context.jsonld - type: Examples url: examples/v2-rate-example.json - type: Examples url: examples/v2-currency-example.json - type: Examples url: examples/v2-currency-detail-example.json - type: Examples url: examples/v2-provider-example.json - type: JSONSchema url: json-schema/v1-rates-on-date-schema.json - type: JSONSchema url: json-schema/v1-rates-by-date-schema.json - type: JSONSchema url: json-schema/v1-rates-schema.json - type: JSONSchema url: json-schema/v1-currencies-schema.json - type: JSONSchema url: json-schema/v1-amount-schema.json - type: JSONSchema url: json-schema/v1-base-schema.json - type: JSONSchema url: json-schema/v1-base-in-schema.json - type: JSONSchema url: json-schema/v1-date-schema.json - type: JSONStructure url: json-structure/v1-rates-on-date-structure.json - type: JSONStructure url: json-structure/v1-rates-by-date-structure.json - type: JSONStructure url: json-structure/v1-rates-structure.json - type: JSONStructure url: json-structure/v1-currencies-structure.json - type: JSONStructure url: json-structure/v1-amount-structure.json - type: JSONStructure url: json-structure/v1-base-structure.json - type: JSONStructure url: json-structure/v1-base-in-structure.json - type: JSONStructure url: json-structure/v1-date-structure.json - type: JSONLD url: json-ld/frankfurter-v1-context.jsonld - type: Examples url: examples/v1-rates-on-date-example.json - type: Examples url: examples/v1-rates-by-date-example.json - type: Examples url: examples/v1-currencies-example.json - aid: frankfurter:frankfurter-rates-api name: Frankfurter Rates API description: Blended currency exchange rates humanURL: https://frankfurter.dev/docs baseURL: https://api.frankfurter.dev/v2 tags: - Rates properties: - type: OpenAPI url: openapi/frankfurter-rates-api-openapi.yml - type: Documentation url: https://frankfurter.dev/docs - type: JSONSchema url: json-schema/v2-rate-schema.json - type: JSONSchema url: json-schema/v2-currency-schema.json - type: JSONSchema url: json-schema/v2-currency-detail-schema.json - type: JSONSchema url: json-schema/v2-provider-schema.json - type: JSONStructure url: json-structure/v2-rate-structure.json - type: JSONStructure url: json-structure/v2-currency-structure.json - type: JSONStructure url: json-structure/v2-currency-detail-structure.json - type: JSONStructure url: json-structure/v2-provider-structure.json - type: JSONLD url: json-ld/frankfurter-v2-context.jsonld - type: Examples url: examples/v2-rate-example.json - type: Examples url: examples/v2-currency-example.json - type: Examples url: examples/v2-currency-detail-example.json - type: Examples url: examples/v2-provider-example.json - type: JSONSchema url: json-schema/v1-rates-on-date-schema.json - type: JSONSchema url: json-schema/v1-rates-by-date-schema.json - type: JSONSchema url: json-schema/v1-rates-schema.json - type: JSONSchema url: json-schema/v1-currencies-schema.json - type: JSONSchema url: json-schema/v1-amount-schema.json - type: JSONSchema url: json-schema/v1-base-schema.json - type: JSONSchema url: json-schema/v1-base-in-schema.json - type: JSONSchema url: json-schema/v1-date-schema.json - type: JSONStructure url: json-structure/v1-rates-on-date-structure.json - type: JSONStructure url: json-structure/v1-rates-by-date-structure.json - type: JSONStructure url: json-structure/v1-rates-structure.json - type: JSONStructure url: json-structure/v1-currencies-structure.json - type: JSONStructure url: json-structure/v1-amount-structure.json - type: JSONStructure url: json-structure/v1-base-structure.json - type: JSONStructure url: json-structure/v1-base-in-structure.json - type: JSONStructure url: json-structure/v1-date-structure.json - type: JSONLD url: json-ld/frankfurter-v1-context.jsonld - type: Examples url: examples/v1-rates-on-date-example.json - type: Examples url: examples/v1-rates-by-date-example.json - type: Examples url: examples/v1-currencies-example.json common: - type: CapabilityMap url: capabilities/frankfurter-capability-edges.yml name: Frankfurter Business Capability Map - type: Releases url: https://github.com/lineofflight/frankfurter/releases - type: AgenticAccess url: agentic-access/frankfurter-agentic-access.yml - type: DomainSecurity url: security/frankfurter-domain-security.yml - type: Website url: https://frankfurter.dev - type: Documentation url: https://frankfurter.dev/docs - type: GitHubOrganization url: https://github.com/lineofflight - type: GitHubRepository title: Frankfurter (canonical) url: https://github.com/lineofflight/frankfurter - type: GitHubRepository title: Frankfurter MCP Server url: https://github.com/lineofflight/frankfurter-mcp - type: License title: MIT License url: https://github.com/lineofflight/frankfurter/blob/main/LICENSE - type: ContainerImage title: Docker (Frankfurter) url: https://hub.docker.com/r/lineofflight/frankfurter - type: ContainerImage title: Docker (Frankfurter MCP) url: https://ghcr.io/lineofflight/frankfurter-mcp - type: Tools title: MCP Server url: https://github.com/lineofflight/frankfurter-mcp - type: Tools title: Hosted MCP Endpoint url: https://mcp.frankfurter.dev/ - type: Tools title: MCP Registry Listing url: https://github.com/modelcontextprotocol/registry - type: PublicAPIsListing url: https://github.com/public-apis/public-apis - type: Issues url: https://github.com/lineofflight/frankfurter/issues - type: Forums url: https://github.com/lineofflight/frankfurter/discussions - type: SpectralRules url: rules/frankfurter-spectral-rules.yml - type: Vocabulary url: vocabulary/frankfurter-vocabulary.yml - type: Plans url: plans/frankfurter-plans-pricing.yml - type: RateLimits url: rate-limits/frankfurter-rate-limits.yml - type: Features data: - name: Blended Reference Rates description: >- Combines daily FX rates from 50+ central banks and monetary authorities into a consensus-filtered, outlier-rejecting blend. - name: Multi-Format Output description: JSON, NDJSON (streamed), and CSV from the same endpoint. - name: Historical Time Series description: Daily rates back to 1948 with optional week/month downsampling. - name: 201 Currencies description: Active and legacy currency coverage with ISO 4217 metadata. - name: Per-Provider Expansion description: >- `expand=providers` exposes each provider's individual quote so callers can audit the blend, with `excluded: true` flags on outliers and peg overrides. - name: No Authentication description: No keys, no accounts, no monthly or daily caps. - name: Self-Hostable description: Single Docker image with optional SQLite volume mount. - name: Free Upstream Provider Keys description: >- Optional, no-cost provider keys for Bank Al-Maghrib, Banco de México, Banco Central de Chile, Bank of Thailand, US Federal Reserve, and the Turkish Central Bank widen self-hosted coverage. - name: Open CORS description: GET and OPTIONS allowed from any origin — direct browser use. - name: Open Source (MIT) description: Full source on GitHub; community contributions and fork-friendly. - type: UseCases data: - name: Treasury and Payments Pricing description: Embed blended FX rates into invoicing, payouts, and conversion. - name: E-commerce Storefront Localization description: Convert displayed prices into the visitor's currency on page load. - name: Reporting and Analytics description: Backfill historical FX into BI dashboards and finance reports. - name: Reference Data Maintenance description: Sync ISO 4217 currency tables and provider metadata into ERPs. - name: AI Assistant Tooling description: >- Equip Claude and other MCP-capable agents with the official Frankfurter MCP server (get_rates, convert, list_currencies, list_providers). - name: Private FX Service description: Self-host inside a VPC for compliance-sensitive workloads. - name: Academic and Research description: Long historical series for FX econometric studies. - type: Integrations data: - name: European Central Bank description: Primary upstream provider (ECB reference rates). - name: US Federal Reserve description: Optional upstream provider via free FED API key. - name: Bank of Canada description: Upstream provider (BOC) included in the blend. - name: Banco Central do Brasil description: Upstream provider (BCB). - name: Turkish Central Bank description: Optional upstream provider via free TCMB key. - name: Bank of Thailand description: Optional upstream provider via free BOT key. - name: Banco Central de Chile description: Optional upstream provider via free BCCh key. - name: Banco de México description: Optional upstream provider via free Banxico key. - name: Bank Al-Maghrib (Morocco) description: Optional upstream provider via free BAM key. - name: Model Context Protocol description: Official MCP server (lineofflight/frankfurter-mcp) registered at the MCP registry. - name: Docker Hub / GHCR description: Container distribution for self-hosting. - name: GitHub Discussions description: Community 'Show and Tell' for libraries and tools built on Frankfurter. - type: Solutions data: - name: Public Hosted (Free) description: api.frankfurter.dev — no key, soft fair-use limits, ideal for prototypes and low-volume production. - name: Self-Hosted FOSS description: Run lineofflight/frankfurter via Docker; no application-level rate limit. - name: MCP Tooling description: Drop the Frankfurter MCP server into any Claude / agent stack for natural-language FX access. maintainers: - FN: Kin Lane email: kin@apievangelist.com