# ArcID (remote · mcp.arcusid.com)

Look up AI agents on Arc: ERC-8004 identity, feedback, validations and USDC-backed trust scores.

- Trust score: 66/100 (medium)
- Registry status: active
- Liveness: live
- Owner verified: no
- Last scored: 2026-09-28

## Components

- remote · `mcp.arcusid.com`: 66/100 (this document), [markdown](https://verifymcp.io/servers/arcusid-arcid-mcp/mcp.md), [page](https://verifymcp.io/servers/arcusid-arcid-mcp/mcp)
- npm · `arcid-mcp`: 69/100, [markdown](https://verifymcp.io/servers/arcusid-arcid-mcp/arcid-mcp.md), [page](https://verifymcp.io/servers/arcusid-arcid-mcp/arcid-mcp)

## Channel facts

- Endpoint: `https://mcp.arcusid.com/mcp`
- Transports: `streamable-http`
- Auth: `none`
- Version: `0.2.0`

## Trust breakdown

How this component scores in each security and reliability category. Every signal is checked automatically against the live server, and we only credit what we can confirm. Scores are 0–100 per category. Scoring method: https://verifymcp.io/docs/scoring (what has changed: https://verifymcp.io/docs/scoring/changelog)

Scored 2026-09-28.

- **Endpoint Security**: 63/100
  - The endpoint's TLS certificate is valid, in date, and uses a strong key.
  - No authorisation is required to call this server. Every tool declares its destructiveHint and none is destructive, so open access doesn't expose one.
  - HTTPS enforcement could not be verified: the plaintext port answered with HTTP 405, which proves neither a plaintext path nor enforcement.
  - HSTS check failed: the Strict-Transport-Security header is absent.
  - DNSSEC check failed: this domain isn't protected by DNSSEC.
- **Transport & Reachability**: 100/100
  - Verified streamable-http transport via a live MCP handshake.
- **Schema Quality & AI Usability**: 69/100
  - AI-judged instruction clarity (good).
  - Tool/resource definitions use about 496 tokens (~82/item across 6 items; 6 tools + 0 resources), lean.
  - Usage-examples check failed: none of the tools include examples.
- **Stability & Change Management**: 3/100
  - Stability observed for 1 of 30 days with no destabilising changes; credit accrues until the full window elapses.
- **Tool Coverage**: 100/100
  - 100% of tools have a non-trivial description (not blank, and not just the tool's name).
  - 100% of tool parameters carry a description.
- **Tool Safety**: 100/100
  - No prompt-injection markers were found in the server instructions, tool names or descriptions we captured.
  - We read all 6 captured tool definition(s), and no name or description among them implies an irreversible operation.
  - An AI judge read all 7 captured unit(s) of tool text and found none that tries to manipulate the model reading it.
- **Capabilities**: 100/100
  - Implements a supported MCP spec version (2025-11-25); the latest is 2026-07-28.

## Install

### How do I install the ArcID MCP server?

ArcID is a hosted endpoint at https://mcp.arcusid.com/mcp, so there is nothing to install locally. Ready-made configuration for Claude, Cursor, VS Code, Codex and 5 more is on this page, copied from each client's own documentation.

### Claude

```bash
claude mcp add --transport http arcusid-arcid-mcp 'https://mcp.arcusid.com/mcp'
```

### Cursor

```json
{
  "mcpServers": {
    "arcusid-arcid-mcp": {
      "url": "https://mcp.arcusid.com/mcp"
    }
  }
}
```

### VS Code

```json
{
  "servers": {
    "arcusid-arcid-mcp": {
      "type": "http",
      "url": "https://mcp.arcusid.com/mcp"
    }
  }
}
```

### Codex

```toml
[mcp_servers.arcusid-arcid-mcp]
url = "https://mcp.arcusid.com/mcp"
```

### opencode

```json
{
  "$schema": "https://opencode.ai/config.json",
  "mcp": {
    "arcusid-arcid-mcp": {
      "type": "remote",
      "url": "https://mcp.arcusid.com/mcp",
      "enabled": true
    }
  }
}
```

### OpenClaw

```bash
openclaw mcp add arcusid-arcid-mcp --url 'https://mcp.arcusid.com/mcp' --transport streamable-http
```

### Hermes

```yaml
mcp_servers:
  arcusid-arcid-mcp:
    url: "https://mcp.arcusid.com/mcp"
```

### Netclaw

```json
{
  "McpServers": {
    "arcusid-arcid-mcp": {
      "Transport": "http",
      "Url": "https://mcp.arcusid.com/mcp"
    }
  }
}
```

### Vellum

```bash
assistant mcp add arcusid-arcid-mcp -t streamable-http -u 'https://mcp.arcusid.com/mcp'
```

### Other

```json
{
  "mcpServers": {
    "arcusid-arcid-mcp": {
      "type": "http",
      "url": "https://mcp.arcusid.com/mcp"
    }
  }
}
```

The mcpServers block is a cross-client convention. Remote transports vary, so check your client's docs.

## Changelog

Every change recorded for this component, newest first. Days that predate change tracking, or that we cannot explain, say so: "we were watching and nothing happened" and "we were not watching" are different claims.

### 2026-09-28 (score 66, 0)

- [functional] We updated how we score, so this day's move reflects our rubric, not a change to the server

### 2026-09-27 (score 66)

First indexed and scored.

## MCP tools (6)

### `search_agents` (~156 tokens)

Search agents

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.

Input parameters:

- `limit` (integer): Results per page, 1-100 (default 24)
- `owner` (string): Owner wallet address
- `page` (integer): Page number, starting at 1
- `query` (string): Full-text search (prefix match on words)
- `readable_only` (boolean): Only agents with a readable profile (name, description). Default true; set false to include unnamed agents
- `sort` (string): Default: relevance when a query is given, otherwise newest

### `get_agent` (~60 tokens)

Get agent

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

Input parameters:

- `agent_id` (integer, required): ERC-8004 agent ID (token ID in the Identity Registry)

### `get_agent_feedback` (~107 tokens)

Get agent feedback

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.

Input parameters:

- `agent_id` (integer, required): ERC-8004 agent ID (token ID in the Identity Registry)
- `limit` (integer): Results per page, 1-100 (default 50)
- `page` (integer): Page number, starting at 1

### `get_agent_validations` (~51 tokens)

Get agent validations

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

Input parameters:

- `agent_id` (integer, required): ERC-8004 agent ID (token ID in the Identity Registry)

### `get_registry_stats` (~29 tokens)

Get registry stats

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

### `get_indexer_health` (~33 tokens)

Get indexer health

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

## Diagnostics

Captured diagnostic sections: TLS, DNSSEC, Authorisation, Transports. The full working is on the page: https://verifymcp.io/servers/arcusid-arcid-mcp/mcp#diagnostics

## Score history

- 2026-09-28: 66
- 2026-09-27: 66

## Common questions

### What is the ArcID MCP server?

ArcID is an MCP server listed in the public MCP registry as io.github.arcusid/arcid-mcp. Look up AI agents on Arc: ERC-8004 identity, feedback, validations and USDC-backed trust scores. This page covers its hosted endpoint (https://mcp.arcusid.com/mcp).

### Is the ArcID MCP server safe to use?

ArcID scores 66 out of 100 on VerifyMCP. That is a record of what we were able to check automatically, not an endorsement. The category breakdown on this page shows every signal behind the number, including the ones we could not confirm.

### What tools does the ArcID MCP server expose?

ArcID exposes 6 tools: search_agents, get_agent, get_agent_feedback, get_agent_validations, get_registry_stats, get_indexer_health. Their descriptions and schemas cost roughly 436 tokens of context every time the server is loaded.

### Does the ArcID MCP server require authentication?

No. We connected to ArcID without credentials and it answered, so anything it exposes is reachable by anyone who knows the address.

### Is the ArcID MCP server still maintained?

ArcID is still listed as active in the MCP registry. We last reached this channel on 28 September 2026. Those dates come from our own scans of the registry and the channel itself, not from anything the publisher announced.

## Links

- Remote endpoint: https://mcp.arcusid.com/mcp
- Repository: https://github.com/arcusid/arcid-mcp
- Website: https://arcusid.com/mcp
- Changelog RSS feed: https://verifymcp.io/servers/arcusid-arcid-mcp/mcp.xml
- Changelog JSON feed: https://verifymcp.io/servers/arcusid-arcid-mcp/mcp.json
- HTML version of this page: https://verifymcp.io/servers/arcusid-arcid-mcp/mcp