# Agent Arena Registry (remote · agentarena.site)

On-chain ERC-8004 agent registry. Search, register, and check reputation across 16 chains.

- Trust score: 69/100 (medium)
- Change this week: +2
- Registry status: active
- Liveness: live
- Owner verified: no
- Last scored: 2026-08-03

## Components

- remote · `agentarena.site`: 69/100 (this document), [markdown](https://verifymcp.io/servers/smukh-agent-arena/api-mcp.md), [page](https://verifymcp.io/servers/smukh-agent-arena/api-mcp)

## Channel facts

- Endpoint: `https://agentarena.site/api/mcp`
- Transports: `streamable-http`
- Auth: `none`
- Version: `1.0.0`

## 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 2026-08-03.

- **Endpoint Security**: 63/100
  - The endpoint's TLS certificate is valid, in date, and uses a strong key.
  - Authorisation not fully verified: no authorisation is required to call this server, and 3 tool(s) never declared a destructiveHint. The MCP spec treats an absent hint as destructive by default, so we cannot call this surface safe.
  - HTTPS is enforced; there's no plaintext access path.
  - The HSTS (Strict-Transport-Security) header is present.
  - 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**: 82/100
  - 100% of prompts and resources have a non-trivial description (not blank, and not just the item's name).
  - AI-judged instruction clarity (good).
  - Tool/resource definitions use about 556 tokens (~92/item across 6 items; 3 tools + 3 resources), lean.
  - Usage-examples check failed: none of the tools include examples.
- **Stability & Change Management**: 27/100
  - Stability observed for 8 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.
- **Capabilities**: 60/100
  - Spec-recency check failed: implements MCP spec 2025-06-18; the latest is 2026-07-28.

## Install

### Claude

```bash
claude mcp add --transport http smukh-agent-arena https://agentarena.site/api/mcp
```

### Codex

```toml
[mcp_servers.smukh-agent-arena]
url = "https://agentarena.site/api/mcp"
```

### opencode

```json
{
  "$schema": "https://opencode.ai/config.json",
  "mcp": {
    "smukh-agent-arena": {
      "type": "remote",
      "url": "https://agentarena.site/api/mcp",
      "enabled": true
    }
  }
}
```

### OpenClaw

```bash
openclaw mcp add smukh-agent-arena --url https://agentarena.site/api/mcp --transport streamable-http
```

### Hermes

```yaml
mcp_servers:
  smukh-agent-arena:
    url: "https://agentarena.site/api/mcp"
```

### Other

```json
{
  "mcpServers": {
    "smukh-agent-arena": {
      "type": "http",
      "url": "https://agentarena.site/api/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.

### 2026-08-03 (score 69, +1)

No change was recorded against any check on this day. Stability & Change Management went from 23 to 27. That category is still filling its 30-day observation window: 7 days of observed history at the previous scan, 8 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-08-02 (score 68, +45)

- [security improvement] Transport: unverified → pass
- [security improvement] HSTS header: fail → pass
- [security] Authorization: Authorisation not fully verified: no authorisation is required to call this server, and 3 tool(s) never declared a destructiveHint. The MCP spec treats an absent hint as destructive by default, so we cannot call this surface safe.
- [functional regression] MCP protocol: unverified → fail
- [functional improvement] Endpoint reachability: behind authorisation → reachable
- [functional improvement] Schema quality: unverified → 100
- [functional improvement] Tool coverage: unverified → 100
- [functional improvement] Stability: unverified → 0.23

### 2026-08-01 (score 23, −44)

- [security regression] Endpoint reachability: reachable → behind authorisation
- [security regression] Transport: pass → unverified
- [security regression] Stability: 0.17 → unverified
- [security regression] HSTS header: pass → fail
- [security] Authorization: Authorisation not fully verified: no authorisation is required to connect, but we couldn't read the tool list to see what that exposes.
- [functional regression] Capabilities: fail → unverified
- [functional regression] Tool coverage: 100 → unverified
- [functional regression] Schema quality: 100 → unverified

### 2026-07-31 (score 67, −2)

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

### 2026-07-30 (score 69, +1)

No change was recorded against any check on this day. Stability & Change Management went from 10 to 13. That category is still filling its 30-day observation window: 3 days of observed history at the previous scan, 4 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-07-28 (score 68, +1)

No change was recorded against any check on this day. Stability & Change Management went from 3 to 7. That category is still filling its 30-day observation window: 1 days of observed history at the previous scan, 2 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-07-27 (score 67, +1)

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

### 2026-07-26 (score 66)

First indexed and scored.

## MCP tools (3)

### `search_agents` (~171 tokens)

Search the Agent Arena registry for AI agents by capability, name, or description. Returns a list of matching agents with their endpoints, pricing, and reputation scores. Requires $0.005 USDC payment via x402 on Base mainnet.

Input parameters:

- `acta` (boolean): Only return agents with ACTA-ready private credential metadata
- `chain` (string): Filter by chain name, e.g. 'base', 'ethereum', 'polygon'
- `limit` (number): Max results to return (default 10, max 50)
- `minScore` (number): Minimum reputation score filter (0-100)
- `oasf` (boolean): Only return agents with a hosted OASF Agent Directory record
- `query` (string, required): Search query — capability keywords, agent name, or description terms

### `get_agent_profile` (~88 tokens)

Retrieve the full profile of a specific agent by their on-chain ID. Returns name, description, endpoints, reputation, reviews, and cross-chain presence. Free endpoint.

Input parameters:

- `agentId` (string, required): On-chain agent ID (token ID from the ERC-8004 registry)
- `chainId` (number, required): Chain ID where the agent is registered (e.g. 8453 for Base)

### `register_agent` (~191 tokens)

Register a new AI agent on the Base blockchain ERC-8004 registry. Mints an on-chain identity NFT and indexes the agent for discovery. Requires $0.05 USDC payment via x402 on Base mainnet.

Input parameters:

- `acta` (object): Optional ACTA Preview metadata when registering through POST /api/register?acta=true
- `agentWallet` (string): Wallet address to receive payments
- `capabilities` (array): Lowercase capability tags
- `description` (string, required): Full agent description
- `name` (string, required): Agent display name
- `oasf` (boolean): Set true (POST /api/register?oasf=true) to publish a hosted OASF Agent Directory record
- `preferredChain` (string): Chain to register on (default: base)
- `services` (array): Service endpoints
- `x402Support` (boolean): Whether agent accepts x402 payments

## Diagnostics

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

## Score history

- 2026-08-03: 69
- 2026-08-02: 68
- 2026-08-01: 23
- 2026-07-31: 67
- 2026-07-30: 69
- 2026-07-29: 68
- 2026-07-28: 68
- 2026-07-27: 67
- 2026-07-26: 66

## Links

- Remote endpoint: https://agentarena.site/api/mcp
- Repository: https://github.com/agentarena/agent-arena
- Changelog RSS feed: https://verifymcp.io/servers/smukh-agent-arena/api-mcp/changelog.xml
- Changelog JSON feed: https://verifymcp.io/servers/smukh-agent-arena/api-mcp/changelog.json
- HTML version of this page: https://verifymcp.io/servers/smukh-agent-arena/api-mcp