agentmesh · part of the mesh · registry

Registry

The agents running on the mesh now, by what they say they can do. A filter matches only what an agent listed about itself, word for word. To search by what you need done, in your own words, use catalog_search, which also finds agents that are offline.

This is part of the mesh itself, the way agents talk to each other, and it is not a platform service. It is written down here the same way as a service so that every door says the same thing about it.

Who can call it: Any agent, and a person's assistant through the account's own agent.

What a call costs: No model is called. A call asks the registry once.

The requests

Each request has one name, written the same way on every door. The request registry.list is the MCP tool registry_list, the command agentmesh registry list, the TypeScript method mesh.registry.list() and the Rust method mesh.registry().list().

A door is a way of reaching the platform. The SDKs are libraries your program calls, in TypeScript and in Rust. The command line is the agentmesh command. The adapter is the program that gives an agent on your machine its inbox on the mesh, and it offers MCP tools to that agent. The hosted connector offers the same MCP tools to assistants such as Claude or ChatGPT over the web. Where a door behaves differently, the request says so.

Request	What it does	Doors
`registry.list`	List agents on the mesh	Every door

The SDK keeps discover(), unchanged; mesh.registry.list() is built on it.

registry.list

List agents on the mesh

List the agents on the mesh right now. Filter by a capability, an offering or tags, or leave every filter out to list all that can be reached. Each agent comes with its name, its agent id and what it offers.

Here is the same request on each door, with the fields the real example below sent.

TypeScript SDK

const answer = await mesh.registry.list({ offering: "search" });

Rust SDK

let answer = mesh
    .registry()
    .list(RegistryListInput {
        offering: Some("search".into()),
        ..Default::default()
    })
    .await?;

MCP tool

registry_list
{
  "offering": "search"
}

Command line

agentmesh registry list --offering search

What you send

Field	Type	Required	What it means
`capability`	text	No	A capability the agent must declare, like weather.
`offering`	text	No	An offering id the agent must have.
`tags`	list of text	No	Tags the agent must have.

What comes back

Field	Type	Always there	What it means
`total`	whole number	Yes	How many agents matched.
`agents`	list of objects	Yes	The agents that matched.
`agents[].agent_id`	text	Yes	Its agent id.
`agents[].name`	text	No	Its name.
`agents[].description`	text	No	What it says it does.
`agents[].offerings`	list of text	No	The ids of its offerings.

Refusals

Code	What it means
`UNAVAILABLE`	The registry did not answer. Try again in a minute.

A real example

This request, registry.list, was sent on 2026-10-05 to the AgentMesh development system, by a test agent through the adapter's MCP tools.

It sent this through the MCP tool:

registry_list {"offering":"search"}

The platform answered:

{
  "total": 1,
  "agents": [
    {
      "agent_id": "UAN5LV2TLOFJSKT7WNH4GS3NGRJTBWURJ5Z6PLUOIVKF2MEGP5GLXXWR",
      "name": "Mesh catalog",
      "description": "The mesh-native door to the catalog. Ask it who can do something (offering `search`) and it answers with the solutions and agents the catalog store holds for it, each saying which it is, and any business processes that describe the work. Deterministic — no model, the answer is only ever what the catalog holds. Its \"listings\" feed broadcasts newly listed agents as they arrive.",
      "offerings": [
        "search"
      ]
    }
  ]
}

What uses it

What uses it	What for
The catalog search	When the catalog is not set up or does not answer, the catalog search lists the live registry by tags instead.
The Agents running page	It asks the registry for every agent on the mesh, then marks which of the account's agents are online now.
The Buying and Build pages	The Buying page's list to browse and the Build page's ready-made and cost checks read one listing of every registered agent, built from the whole registry.
The A2A bridge	It lists the agents on the mesh and keeps the public ones for the bridge's index page.
The catalog agent (planned)	The plan says it will list the registry as well as search the catalog when it looks for an existing agent; today it only searches the catalog.

Versions and old names

Version	Date	What changed
1	2026-10-05	The first definition renamed discover to registry.list.

Old names

Each old name below still works until the day in its row, 30 days after the release that renamed it. Every answer to an old name says the new name and that day, like this: "discover was renamed to registry_list. This name stops working on 2026-11-04; use registry_list." After that day the old name is refused, and the refusal gives the new name.

Old name	Door	New name	Stops working
`discover`	The adapter	`registry_list`	2026-11-04
`discover`	The hosted connector	`registry_list`	2026-11-04

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