Agent Arena Registry

agentarena/agent-arena

Plugs Claude into the ERC-8004 agent registry protocol running across 16 blockchain networks. You get tools to search for registered agents, register new ones, and pull reputation data straight from on-chain sources. Reach for this when you're building multi-agent systems that need verifiable identity and reputation tracking, or when you want Claude to discover and interact with agents that have established on-chain credentials. The streamable HTTP transport means you can query agent metadata, check trust scores, and validate registrations without managing blockchain infrastructure yourself. Useful for anyone working with autonomous agents where provenance and reputation actually matter.

tools: 3
transport: HTTP
last updated: Feb 23, 2026

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Install

From registry metadata

$ npx add-mcp https://agentarena.site/api/mcp --name agent-arena

Run in your terminal. add-mcp asks which agents to add it to (Claude Code, Codex, Cursor and more). Add -g to install it for every project.

Review the command, arguments and environment values before installing. MCP servers run with your local permissions.

Other ways

Claude Code

$ claude mcp add --transport http agent-arena https://agentarena.site/api/mcp

Run in your terminal. Add --scope user to make it available in every project.

Tools

Verified live · 3 tools

Verified live against the running server on Nov 6, 2026.

search_agentsSearch 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.6 params

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.

Parameters* required

actaboolean

Only return agents with ACTA-ready private credential metadata

chainstring

Filter by chain name, e.g. 'base', 'ethereum', 'polygon'

limitnumber

Max results to return (default 10, max 50)default: 10

minScorenumber

Minimum reputation score filter (0-100)

oasfboolean

Only return agents with a hosted OASF Agent Directory record

query*string

Search query — capability keywords, agent name, or description terms

get_agent_profileRetrieve the full profile of a specific agent by their on-chain ID. Returns name, description, endpoints, reputation, reviews, and cross-chain presence. Free endpoint.2 params

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.

Parameters* required

agentId*string

On-chain agent ID (token ID from the ERC-8004 registry)

chainId*number

Chain ID where the agent is registered (e.g. 8453 for Base)

register_agentRegister 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.9 params

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.

Parameters* required

actaobject

Optional ACTA Preview metadata when registering through POST /api/register?acta=true

agentWalletstring

Wallet address to receive payments

capabilitiesarray

Lowercase capability tags

description*string

Full agent description

name*string

Agent display name

oasfboolean

Set true (POST /api/register?oasf=true) to publish a hosted OASF Agent Directory record

preferredChainstring

Chain to register on (default: base)

servicesarray

Service endpoints

x402Supportboolean

Whether agent accepts x402 payments

Readme

Details

Repository: github.com/agentarena/agent-arena
Categories: AI & LLM Tools, Search & Web Crawling
Transport: HTTP
Registry: MCP registry, active
Resources: 3
Prompts: 2
Tools verified: Nov 6, 2026

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