# Coverage · Agenstry

A2A agents

8,690

JSON-RPC live

1,104

MCP servers

205,719

Sources active

45

## Source health

Contribution counts below are lifetime totals and never decay — a source that
died last year still shows its full bar. This table is the live signal: the
outcome of each source's most recent discovery run.

| Source | Feeds | State | Last yield | Last success |
| --- | --- | --- | --- | --- |
| crtsh | agent\_urls | degraded (2×) | 0 | 2026-10-07 00:23 |
| agntcy\_directory | agent\_urls | not run | 0 | — |
| aws\_agent\_registry | agent\_urls | not run | 0 | — |
| azure\_foundry | agent\_urls | not run | 0 | — |
| cloudflare\_ans | agent\_urls | not run | 0 | — |
| composio | mcp | not run | 0 | 2026-10-07 11:02 |
| cursor\_mcp | mcp | not run | 0 | 2026-09-08 19:25 |
| docker\_catalog | mcp | not run | 0 | 2026-10-07 11:02 |
| docker\_hub | mcp | not run | 0 | 2026-10-07 11:02 |
| gcp\_agent\_registry | agent\_urls | not run | 0 | — |
| glama\_api | mcp | not run | 0 | — |
| huggingface\_models | agent\_urls | not run | 0 | — |
| huggingface\_spaces | agent\_urls | not run | 0 | 2026-09-01 07:15 |
| jsr | mcp | not run | 0 | 2026-10-07 11:02 |
| mcp\_registry\_servers | registry | not run | 0 | 2026-08-25 04:55 |
| n8n\_community | mcp | not run | 0 | 2026-10-07 11:02 |
| open\_web | agent\_urls | not run | 0 | — |
| postman\_workspaces | agent\_urls | not run | 0 | — |
| pypi | mcp | not run | 0 | 2026-10-07 11:17 |
| shopify | mcp | not run | 0 | 2026-10-07 11:02 |
| x402\_services | mcp | not run | 0 | — |
| 8004scan | agent\_urls | healthy | 119 | 2026-10-07 20:21 |
| a2a\_registry\_org | agent\_urls | healthy | 800 | 2026-10-07 19:25 |
| a2aregistry | agent\_urls | healthy | 528 | 2026-10-07 17:10 |
| agent\_skills\_index | skills | healthy | 293 | 2026-10-08 00:57 |
| agentic\_market | payment | healthy | 3,455 | 2026-10-07 15:44 |
| aggregator\_lists | mcp | healthy | 406 | 2026-10-08 00:29 |
| anthropic\_connectors | mcp | healthy | 327 | 2026-10-07 23:31 |
| azure\_mcp\_center | mcp | healthy | 107 | 2026-10-07 23:31 |
| circle\_gateway\_balances | payment | healthy | 22 | 2026-10-07 17:01 |
| claude\_plugins | mcp | healthy | 131 | 2026-10-07 23:32 |
| claude\_plugins\_official | skills | healthy | 376 | 2026-10-08 00:55 |
| claudeskills\_info | skills | healthy | 100 | 2026-10-08 00:53 |
| cline\_marketplace | mcp | healthy | 199 | 2026-10-07 23:31 |
| ct | agent\_urls | healthy | 4 | 2026-10-07 18:04 |
| erc8004 | agent\_urls | healthy | 13 | 2026-10-07 20:04 |
| gemini\_cli\_extensions | mcp | healthy | 1,053 | 2026-10-07 23:31 |
| github\_code | agent\_urls | healthy | 6,020 | 2026-10-07 18:03 |
| github\_mcp\_registry | mcp | healthy | 394 | 2026-10-07 23:36 |
| github\_mcp\_repos | registry | healthy | 1,022 | 2026-10-07 18:48 |
| github\_topics | agent\_urls | healthy | 527 | 2026-10-07 17:28 |
| glama\_sitemap | registry | healthy | 29,991 | 2026-10-07 18:47 |
| langchain\_hub | agent\_urls | healthy | 8,000 | 2026-10-07 19:15 |
| lists | agent\_urls | healthy | 3,345 | 2026-10-07 17:22 |
| manifests | agent\_urls | healthy | 47,979 | 2026-10-07 18:25 |
| mcp\_registry | agent\_urls | healthy | 43,249 | 2026-10-07 17:24 |
| mcp\_registry\_full | mcp | healthy | 40,182 | 2026-10-07 23:35 |
| mcp\_so | mcp | healthy | 18,687 | 2026-10-07 15:46 |
| n8n\_workflows | agent\_urls | healthy | 10,669 | 2026-10-07 17:22 |
| nanda\_index | agent\_urls | healthy | 267 | 2026-10-07 19:40 |
| npm | mcp | healthy | 2,465 | 2026-10-08 00:29 |
| openai\_plugins | skills | healthy | 400 | 2026-10-08 00:57 |
| registry | agent\_urls | healthy | 1,065 | 2026-10-07 17:22 |
| rpc:arbitrum:fallback | rpc | healthy | 1 | 2026-10-07 23:09 |
| rpc:arbitrum:primary | rpc | healthy | 1 | 2026-10-07 23:09 |
| rpc:arc:fallback | rpc | healthy | 1 | 2026-10-07 23:09 |
| rpc:arc:primary | rpc | healthy | 1 | 2026-10-07 23:09 |
| rpc:avalanche:fallback | rpc | healthy | 1 | 2026-10-07 23:09 |
| rpc:avalanche:primary | rpc | healthy | 1 | 2026-10-07 23:09 |
| rpc:base:fallback | rpc | healthy | 1 | 2026-10-07 23:09 |
| rpc:base:primary | rpc | healthy | 1 | 2026-10-07 23:09 |
| rpc:ethereum:fallback | rpc | healthy | 1 | 2026-10-07 23:09 |
| rpc:ethereum:primary | rpc | healthy | 1 | 2026-10-07 23:09 |
| rpc:monad:fallback | rpc | healthy | 1 | 2026-10-07 23:09 |
| rpc:monad:primary | rpc | healthy | 1 | 2026-10-07 23:09 |
| rpc:optimism:fallback | rpc | healthy | 1 | 2026-10-07 23:09 |
| rpc:optimism:primary | rpc | healthy | 1 | 2026-10-07 23:09 |
| rpc:polygon:fallback | rpc | healthy | 1 | 2026-10-07 23:09 |
| rpc:polygon:primary | rpc | healthy | 1 | 2026-10-07 23:09 |
| rpc:tempo:fallback | rpc | healthy | 1 | 2026-10-07 23:09 |
| rpc:tempo:primary | rpc | healthy | 1 | 2026-10-07 23:09 |
| sitemap | agent\_urls | healthy | 95 | 2026-10-07 18:07 |
| skill\_library\_github | skills | healthy | 822 | 2026-10-08 00:53 |
| skills\_sh | skills | healthy | 322 | 2026-10-08 00:55 |
| smithery | agent\_urls | healthy | 12,909 | 2026-10-07 17:27 |
| smithery\_servers | registry | healthy | 18,926 | 2026-10-07 18:47 |
| smithery\_skills | skills | healthy | 6,000 | 2026-10-08 00:54 |
| ucp\_profiles | payment | healthy | 354 | 2026-10-07 17:02 |
| x402\_facilitator\_anyspend | payment | healthy | 19 | 2026-10-08 02:10 |
| x402\_facilitator\_dexter | payment | healthy | 3,215 | 2026-10-08 02:10 |
| x402\_facilitator\_goplausible | payment | healthy | 2,551 | 2026-10-08 02:10 |
| x402\_facilitator\_ultravioleta | payment | healthy | 1,726 | 2026-10-08 02:10 |

## Contribution per source

**recrawl\_hot**

**6,392** agents

**recrawl\_warm**

**6,335** agents

**agentic\_market**

**4,191** agents

**cdp\_discovery**

**3,440** agents

**manifests**

**2,068** agents

**mcp\_registry**

**1,747** agents

**n8n\_workflows**

**1,187** agents

**x402\_list**

**1,062** agents

**github\_code**

**894** agents

**smithery**

**779** agents

**registry**

**735** agents

**a2aregistry**

**602** agents

**lists**

**544** agents

**a2a\_registry\_org**

**304** agents

**recrawl\_cold**

**290** agents

**dexter\_discovery**

**179** agents

**github\_topics**

**163** agents

**submitted**

**108** agents

**mpp**

**93** agents

**erc8004**

**64** agents

**pay\_sh**

**51** agents

**8004scan**

**51** agents

**a2a-validate**

**39** agents

**crtsh**

**38** agents

**sitemap**

**36** agents

**resalvage-20260817b**

**21** agents

**resalvage-20260817**

**21** agents

**nanda\_index**

**16** agents

**ultravioleta\_discovery**

**15** agents

**seeds**

**13** agents

**gate-widen-20260819**

**13** agents

**operator\_request**

**9** agents

**anyspend\_discovery**

**8** agents

**goplausible\_discovery**

**5** agents

**recrawl\_weekly**

**4** agents

**manual\_recrawl**

**4** agents

**manual-verify**

**3** agents

**manual**

**3** agents

**ct**

**3** agents

**owner\_reprobe**

**2** agents

**test\_fix\_verification**

**1** agents

**manual\_rescan**

**1** agents

**manual-resubmit**

**1** agents

**lf\_a2a\_members**

**1** agents

**huggingface\_spaces**

**1** agents

## Source overlap

How many sources discovered the same agent. More overlap = higher cross-source confidence in that agent's existence.

| Sources per agent | Agents |
| --- | --- |
| 1 source | 2,155 |
| 2 sources | 3,080 |
| 3 sources | 2,938 |
| 4 sources | 2,278 |
| 5 sources | 653 |
| 6 sources | 210 |
| 7 sources | 65 |
| 8 sources | 22 |
| 9 sources | 11 |
| 10 sources | 3 |
| 11 sources | 1 |

## What we crawl

- **registry**: a2aregistry.org JSON API
- **lists**: 7 curated GitHub awesome-lists for A2A + MCP
- **mcp\_registry**: official MCP registry (deep paginated)
- **smithery**: Smithery MCP server registry (deep paginated)
- **glama**: Glama MCP server + connector sitemaps, stored as metadata-only unless a remote endpoint can be probed
- **direct\_mcp**: MCP-looking URLs found in registries, manifests, and lists, probed directly via Streamable HTTP/SSE
- **manifests**: machine-readable manifests on known hosts: `agent-directory.json`, `agents.json`, `mcp.json`, `llms.txt`, `agents.txt`
- **github\_topics**: GitHub repos tagged `a2a-agent` / `a2a-protocol` / `mcp-server` (~15K repos)
- **agntcy**: AGNTCY's public OASF directory (when reachable)
- **github\_code**: GitHub code search for agent-card.json (requires token)
- **ct**: CertSpotter Certificate Transparency for ~24 PaaS providers (Render, Fly, Railway, Vercel, Netlify, Deno, Replit, Modal, Heroku, Cloudflare Workers, …) matching agent/a2a/mcp keywords
- **crtsh**: crt.sh CT corpus full-text search for `a2a`, `agent-card`, `mcp-server`, `agentapi`
- **seeds**: manual seed list
- **submitted**: direct opt-in via /submit form

### Big-tech A2A endpoints: what we tried

Direct probes of canonical well-known paths on the major vendor surfaces (Google, OpenAI, Anthropic, Microsoft, AWS, Salesforce, SAP, ServiceNow).
Most return 401/403/404 because real tenant agents live behind project IDs and OAuth. This table is the audit trail.
Re-run weekly; last status from the most recent crawler cycle.

| URL | Status |
| --- | --- |
| `https://agentforce.salesforce.com/.well-known/agent-card.json` | unsafe: dns: [Errno -2] Name or service not known |
| `https://agents.microsoft.com/.well-known/agent-card.json` | unreachable: ConnectError |
| `https://agentspace.google.com/.well-known/agent-card.json` | no\_endpoint |
| `https://anthropic.com/.well-known/agent-card.json` | no\_endpoint |
| `https://api.anthropic.com/.well-known/agent-card.json` | no\_endpoint |
| `https://api.openai.com/.well-known/agent-card.json` | no\_endpoint |
| `https://assistant.google.com/.well-known/agent-card.json` | no\_endpoint |
| `https://bedrock-agents.aws.amazon.com/.well-known/agent-card.json` | unsafe: dns: [Errno -2] Name or service not known |
| `https://chatgpt.com/.well-known/agent-card.json` | unsafe: response body exceeds 262144 bytes |
| `https://claude.ai/.well-known/agent-card.json` | no\_endpoint |
| `https://copilot.microsoft.com/.well-known/agent-card.json` | not json |
| `https://copilotstudio.microsoft.com/.well-known/agent-card.json` | not json |
| `https://dialogflow.cloud.google.com/.well-known/agent-card.json` | not json |
| `https://einstein.salesforce.com/.well-known/agent-card.json` | unsafe: dns: [Errno -2] Name or service not known |
| `https://joule.sap.com/.well-known/agent-card.json` | unsafe: dns: [Errno -2] Name or service not known |
| `https://now-assist.service-now.com/.well-known/agent-card.json` | unsafe: dns: [Errno -2] Name or service not known |
| `https://openai.com/.well-known/agent-card.json` | no\_endpoint |
| `https://q.amazonaws.com/.well-known/agent-card.json` | unsafe: dns: [Errno -2] Name or service not known |

### What we don't crawl (and why)

- **NPM/PyPI package registries**: packages are *code*, not deployed agents. We catch many through GitHub, official registries, Smithery, Glama, and manifest links.
- **Random .well-known crawl of all domains**: would require Common Crawl scale; current candidates / signal-to-noise is too low (mostly 404s).
- **Auth-gated agents**: agents behind OAuth/API-keys are visible in directories but un-probeable anonymously.
- **Truly private / unpublished agents**: fundamentally unindexable. By design.