A2A Agent Card · Agent Disco

Agent Disco

Grade any public URL for AI-agent discoverability. Scans robots.txt, llms.txt, well-known manifests, OpenAPI specs, SDK signals, and registry presence — returns a letter grade with a per-category breakdown and fix hints.

Open the live agent card → Agent endpoint Agent Disco provider profile
⚠ Agent card, not A2A. Agent Disco serves a machine-readable agent manifest at the A2A discovery path, but it fails a structural check in the A2A 1.0.0 AgentCard object. It is an agent card in spirit rather than in schema — useful for discovery, but an A2A client cannot assume it will parse.
Legacy discovery path. This card is served at /.well-known/agent.json, the pre-0.3 location, rather than the current /.well-known/agent-card.json. Clients written against A2A 1.0.0 will not find it.
Provider: Agent Disco Conformance: Flavored Protocol: Transport: Version: 1.0.0 Host: agentdisco.io Skills: 5
Discovery

An A2A client finds this agent by fetching the well-known path on the provider's own host. That is what makes an agent card different from every other agent artifact in this catalog: it is provider-published by construction — it cannot be derived, generated, or reconstructed on a provider's behalf.

https://agentdisco.io/.well-known/agent.json
Skills (5)

Submit a scan submit-scan

Grade a URL for AI-agent discoverability. Returns a scan id immediately; result is available once status=completed (typically under a minute).

Get the latest grade for a host get-latest-grade

Retrieve the most-recent completed grade + per-category breakdown for a host that has been scanned.

List the check catalogue list-checks

Return the full catalogue of discoverability checks the scanner runs, each with weight, category, and description.

Get the embeddable grade badge embed-badge

Return an SVG badge showing a host's current grade + score, suitable for embedding on the host's own site.

Sign in with a Colony agent identity colony-agent-login

Present a Colony id_token pre-exchanged for AgentDisco (OAuth 2.0 Token Exchange, RFC 8693, audience colony_gNvs-06hD2sPmBWHgQ4skwGUMpDwqmcl) for an authenticated-tier AgentDisco API key. Non-interactive (no browser/redirect); agent-only — humans use the website's "Log in with the Colony". POST /api/v1/auth/colony/agent with the token as id_token.

Documentation
Evidence. Fetched 2026-09-19 from https://agentdisco.io/.well-known/agent.json, HTTP 200. The body was saved verbatim and is the sole source for everything on this page — no field is inferred. View the captured card. Providers change what they serve; if this card has moved or changed shape, the provider profile carries the current state as of the last build.

Work with this as data

Every agent card here is available over the APIs.io API and to AI agents over MCP. A2A Agent Cards is not yet its own endpoint on the v1 API. Reach it through catalog search and the tag graph, or the MCP server.

MCP server

One button, every client — Claude, Cursor, VS Code and the rest.

https://apis.io/mcp

Tools for a2a agent cards

3 MCP tools reach this
  • apis_io_searchSTART HERE — APIs, providers and tags for one query, each with its total.
  • resolveTurn a domain, URL or GitHub org into the provider it belongs to.
  • find_cohortsEvery scored population of providers in the catalog.
All 92 tools →

Call it yourself

curl for this page
Search the catalog 
curl "https://apis.io/api/v1/search?q=agentdisco-io&limit=10"
Everything under a tag 
curl "https://apis.io/api/v1/tags/agentdisco-io"

Discovery needs no key. Ratings and market analysis are Pro.

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