# Agent Zero

**Canonical:** https://apis.io/providers/onchainagentintel-io/  
**Website:** https://onchainagentintel.io/  
**APIs profiled:** 2

Agent Zero (On-Chain Agent Intel, onchainagentintel.io) is an agent-native intelligence service for the ERC-8004 agent economy: it continuously indexes the ERC-8004 agents registered on Base and Ethereum, probes their advertised MCP, OpenAPI and .well-known endpoints for liveness, joins on-chain payment activity and ReputationRegistry rows, and scores each agent for buyer-POV readiness and trust. The intelligence is sold per call over the x402 protocol (USDC via EIP-3009 or native ETH, no accounts, no API keys) through a 25-operation OpenAPI 3.1 REST API at https://api.onchainagentintel.io, a free anonymous remote MCP server at /mcp, an A2A agent card at /.well-known/agent-card.json, an x402 Bazaar discovery manifest, an llms.txt and a published Agent Skill. It also sells Solidity security audits and ERC-8183 deliverable evaluations, and is itself ERC-8004 agentId 19353 on Base.

## Kin Score — 44.1 / 100 (developing)

Scored 2026-10-09 under rubric 0.23.0. Trend: flat (+0.0 from 44.1).

| Facet | Score |
|---|---|
| Discoverability | 75.0 |
| Contract Quality | 47.5 |
| Contract Governance | 18.2 |
| Operational Transparency | 15.8 |
| Developer Ergonomics | 50.0 |
| Access Clarity | 55.3 |

Regulatory layer — **Horizontal (data, software, accessibility, platform)**: 16.7 (matched via fallback).

## Agent readiness — 32.9 (agent-ready)

| Dimension | Value |
|---|---|
| Spec Presence | yes |
| Agentic Access | no |
| Reversibility Documented | no |
| MCP Server | documented |
| Auth Clarity | bearer |
| Idempotency | documented |
| Error Semantics | derived |
| OpenAPI Examples | partial |
| Rate Limit Signal | documented |
| Event Surface Described | no |
| Agent Skills | yes |
| Well Known Catalog | no |
| Consent Identity | no |
| Agent Card | flavored |
| Dry Run Mode | no |
| Delegated Identity | no |
| Protected Resource Metadata | no |
| Dynamic Client Registration | no |
| Agentic Commerce | no |

## APIs (4)

- **Agent Zero MCP Server** — Free, anonymous remote Model Context Protocol server at https://api.onchainagentintel.io/mcp (Streamable HTTP, protocol version 2025-06-18, serverInfo agent-zero-intel 1.8.0). t...
- **Agent Zero A2A Agent** — Agent2Agent surface: an agent card served from https://onchainagentintel.io/.well-known/agent-card.json (mirrored on www and api hosts) naming the JSON-RPC endpoint https://api....
- **Agent Zero Paid X402 API** — Paid endpoints — settle with X-PAYMENT header per x402.
- **Agent Zero Public API** — Free endpoints — no payment, no auth.

## MCP servers (1)

- **Agent Zero MCP Server** — Agent Zero operates a free, anonymous remote MCP server at https://api.onchainagentintel.io/mcp (Streamable HTTP; a GET or a POST without Accept text/event-stream returns 406 -3...

## Security (2)

- **Onchainagentintel Io Authentication** — apiKey · 3 schemes
- **Onchainagentintel Io Domain Security** — TLSv1.3

## Plans (1)

- **Onchainagentintel Io Plans Pricing**

## Tags

Agents, Agent Intelligence, ERC-8004, x402, Agentic Commerce, Blockchain, Ethereum, Base, Web3, MCP, A2A, Smart Contracts, Security Audits, Agent-Native

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Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/providers/onchainagentintel-io/). Scores are computed from the provider's own public artifacts under a published rubric.