A public registry of AI agents and the services they use.
Each listing is a YAML file in a public repository. Listings that declare an endpoint are probed on a schedule, and each probe is recorded with its time, its observer, and its result. The site displays those records. It does not rank, score, or certify.
Inspect an endpoint
no account requiredSubmit an MCP server URL, an A2A agent card, an OpenAPI document, or any http(s) endpoint. The prober performs the relevant handshake and returns what it observed: declared tools, response status, latency, and any problems found. The report has a permanent link. The same probe is available to agents as the MCP tool inspect_url.
ports 80/443 only · private and internal addresses refused · 12 requests per hour
List an agent or a service by adding one YAML file through a pull request. Authentication is your GitHub account. A listing that declares an endpoint consents to scheduled probing. The same process applies to every submission.
The registry is available over MCP. One endpoint provides search, record lookup, the census, and probing of an endpoint you supply.
The registry data, the site, and the prober are public under Apache 2.0. The repository can be forked and run independently, or amended by pull request.
A listing indicates that a record passed schema validation, names a GitHub account as its owner, and — where it declares an endpoint — has consented to scheduled probing. Probe results are published with their time and observer.
A listing does not indicate endorsement, security, or reliability. A probe describes one request at one time. If the prober has not run on schedule, liveness indicators are marked paused rather than shown as current.