MCP.Market

ArcID MCP server

online · 100% uptime
by arcusid·io.github.arcusid/arcid-mcp·v0.2.0
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Look up AI agents on Arc: ERC-8004 identity, feedback, validations and USDC-backed trust scores.

A91/100grade A
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Safety scan
A91/100

full report

Adoption
Growing

0 stars

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If you have run it, two minutes of your experience saves the next person an afternoon.

ArcID tools (6)

write = sends, deletes, buys or posts
  • get_agentFree

    Full ArcID record for one agent: profile, owner, agent wallet, reputation summary, validations, trust score and the USDC settlement evidence behind it.

  • get_agent_feedbackFree

    Feedback left for an agent in the ERC-8004 Reputation Registry, newest first. Each entry is classified (receipt, rating, metric, self, revoked) with a normalised 0-100 rating where applicable.

  • get_agent_validationsFree

    The latest 100 validation requests and responses for an agent from the ERC-8004 Validation Registry.

  • get_indexer_healthFree

    How far the ArcID indexer is behind the Arc chain head. Check this when results look empty or stale.

  • get_registry_statsFree

    Totals across the ArcID index: agents, owners, feedback, validations and settled USDC.

  • search_agentsFree

    Search the ArcID directory of AI agents registered on Arc (ERC-8004). Supports full-text search over names and descriptions, filtering by owner address, and sorting by trust score, feedback count or settled USDC.

Public scan report

scanner v0.1.9 · 2026-09-27 · same rubric, same numbers if you re-run it

no findings
  • Code scan7 source files scanned25/25
  • Live reliabilityremote reachable in 573ms20/20
  • Tool poisoning6 tool descriptions checked15/15
  • Auth qualityopen endpoint, read-only tools10/15
  • Maintenancelast push 0 days ago15/15
  • Maintainer identityregistry namespace matches repository owner6/10
Overall 91/100. Components that don't apply are left out of the denominator. Any critical finding is an F.RubricAppeal a findingJSON

How ArcID compares

Against every graded MCP server, from our own scans and uptime checks. Updated after each scan run.

Safety score
91/100
higher than 85% of 48,255 servers
Tools
6
the typical server has 7
Tools that change things
0%
typical: 0%. Fewer write tools means less an agent can break
Uptime
100%
of our recent checks; the typical remote server answers 100%
Response time
148 ms
faster than 73% of 30,031 servers

What its tools let an agent do: 6 read

Install ArcID in Claude Code, Cursor or VS Code

claude mcp add --transport http arcid-mcp https://mcp.arcusid.com/mcp
Add to Cursor

What the publisher says

From the ArcID repository's README, as published. We do not edit it. Read it on GitHub

arcid-mcp

MCP server for ArcID, the identity and reputation layer for AI agents on Arc. It lets Claude and other MCP clients look up agents registered in the ERC-8004 registries: profiles, owners, feedback, validations and USDC-weighted trust scores.

Read-only. No wallet or API key needed.

Tools

Connect

Remote (claude.ai, ChatGPT, any URL-based client)

https://mcp.arcusid.com/mcp

Streamable HTTP, stateless, no authentication.

  • claude.ai / Claude Desktop: Settings → Connectors → Add custom connector → paste the URL.
  • ChatGPT: Settings → Apps & Connectors → Advanced → enable Developer mode → Create → paste the URL, authentication: none.
  • Claude Code: claude mcp add --transport http arcid https://mcp.arcusid.com/mcp

Local (stdio via npx)

No install step needed; clients run it with npx.

Claude Code

claude mcp add arcid -- npx -y arcid-mcp

Claude Desktop / Cursor / other clients

{
  "mcpServers": {
    "arcid": {
      "command": "npx",
      "args": ["-y", "arcid-mcp"]
    }
  }
}

Configuration

Development

git clone https://github.com/arcusid/arcid-mcp.git && cd arcid-mcp && npm install
npm run dev            # run from source (tsx)
npm test               # vitest
npm run test:coverage  # 80% threshold enforced
npm run inspect        # MCP Inspector against dist/
npm run worker:dev     # remote endpoint locally (wrangler)
npm run worker:deploy  # typecheck, test, deploy the Worker

The remote endpoint is worker/index.ts: a Cloudflare Worker that serves the same tools over Streamable HTTP (src/http.ts). It reaches the ArcID API through a service binding and forwards the caller's IP, so API rate limits apply per user.

License

MIT

Nothing above is checked by us. What we check is on the safety report.

ArcID: common questions

Is ArcID MCP server safe?
Yes, by our scan: it is graded A (91/100). Read the ArcID safety report
How do I install ArcID?
It runs remotely at mcp.arcusid.com. Add it to Claude Code, Cursor, VS Code or Claude Desktop with the snippets above, or call it through the mcp.market gateway without installing anything.
Does ArcID need an API key?
No secret keys are declared. It reads 1 setting from the environment.
Is ArcID maintained?
The last commit was 38 days ago (2026-09-27). The latest release is v0.2.0.
Is ArcID up?
100% of our last 28 checks got an answer. We check remote servers about four times a day.
How does ArcID compare with other MCP servers?
safety score 91/100 (higher than 85% of 48,255 servers); tools 6 (the typical server has 7); tools that change things 0% (typical: 0%. Fewer write tools means less an agent can break). Full comparison.