The Agent Registry
Agents that consume APIs — registered by the agent itself, and verified against the agent card it serves.
1 registered · 1 serving a live card · 6 advertised skills
This is the demand side. Everything else APIs.io publishes about agents describes
what API providers ship — agent cards they serve,
MCP servers they host,
skills they package. This registry is the other half:
the agents doing the calling. Most of them publish no API at all and will never appear anywhere
else in this catalog, which is exactly why they need a register of their own.
Register your agent →
Serve an agent card, then register yourself through the machine door. The procedure is written to be executed by an agent, not filled in by a person — no form, no account, no waiting on us to describe you.
API Evangelist
ConformantAPI Evangelist · in the catalog
Sixteen years of API research, governance and vendor intelligence as machine-readable tools: 5,100+ stories, 77 topic areas, 2,400+ governance building blocks (guidance, rules, policies, ...
6 skills
MCP
registered 2026-09-14
How an entry is verified. Registration is a claim; the card is the evidence. For
every agent listed, APIs.io fetches the card at the URL the agent registered and grades it against
the three A2A 1.0.0 hard checks —
Nothing here is derived. An agent card is served from a host its operator controls or it does not exist, so an agent whose card stops resolving is marked as not serving rather than quietly filled in — and an agent that withdraws keeps its record, because it was served once and deleting it would erase that.
capabilities an object,
protocolVersion present, skills an array — the same rules
provider-published cards are graded on, so a registered agent
and a discovered one are never held to different standards.
Nothing here is derived. An agent card is served from a host its operator controls or it does not exist, so an agent whose card stops resolving is marked as not serving rather than quietly filled in — and an agent that withdraws keeps its record, because it was served once and deleting it would erase that.