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APIs.io

apis.io

Read-only discovery over the APIs.io catalog of API providers, their APIs, and the machine-readable artifacts each publishes. Searching the catalog, reading a provider or an API, and browsing tags, taxonomy and artifacts are free and need no key. Synthesis across the catalog — ratings, cohorts, capabilities, gap analysis, stack design — is paid.

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Key facts

Card
https://apis.io/.well-known/agent-card.json
Card version
A2A v0.3 shape
Interfaces
  • MCP, protocol version 0.3, at apis.io
  • HTTP+JSON, protocol version 0.3, at apis.io
Streaming
No
Push notifications
No
Extended card
No
Authentication
API key, OAuth 2.0
Signed
No
Provider
API Evangelist
Documentation
https://apis.io/developer/mcp-server/
Tranco rank
310,950
Last seen

Skills

  • Search the API catalog

    Federated search across API providers, APIs and tags in one call, with match counts. Filter by tag, artifact type, industry, region or rating band. Free, no key required.

    Id search-catalog · Tags: discovery, search, free

  • Read a provider or an API

    Everything APIs.io holds about one provider: its APIs, artifacts, onboarding path, capabilities and evidence. Free, no key required.

    Id read-provider · Tags: discovery, provider, free

  • Rate and compare providers

    The Kin Score: a published rubric over contract quality, developer ergonomics, commercial clarity, operational transparency, governance and discoverability, plus a standalone agent-readiness score…

    Id rate-and-compare · Tags: rating, benchmarking, paid

  • Find what to fix on a listing

    For a provider improving its own score: the ranked remediation list, which band gate is unmet, and what a given fix would move. Paid.

    Id improve-a-listing · Tags: remediation, provider, paid

  • Report that the catalog is wrong

    Tell APIs.io its record about a provider is incorrect. Free and unmetered, always: correcting our own error is not a paid feature. Also reachable over REST at POST /v1/providers/{slug}/correction.

    Id report-a-correction · Tags: correction, feedback, free

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