aid: onchainagentintel-io name: Agent Zero description: >- 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. url: https://raw.githubusercontent.com/api-evangelist/onchainagentintel-io/refs/heads/main/apis.yml image: https://onchainagentintel.io/logo.png x-type: company x-source: harvest:a2a-registry x-tier: profiled x-tier-reason: enrichment pass 2026-09-19 (local-v3; was a2a-registry harvest stub) specificationVersion: '0.20' created: '2026-09-19' modified: '2026-09-19' tags: - Agents - Agent Intelligence - ERC-8004 - x402 - Agentic Commerce - Blockchain - Ethereum - Base - Web3 - MCP - A2A - Smart Contracts - Security Audits - Agent-Native tags_raw: - Agents - Agent intelligence - ERC-8004 - x402 - Agent commerce - Blockchain - Ethereum - Base - Web3 - MCP - A2A - Smart contracts - Security audits - Agent-native - Agent Commerce - agent-native apis: - aid: onchainagentintel-io:agent-zero-mcp-server name: Agent Zero MCP Server description: >- 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). tools/list answers without credentials with four read-only, counts-only tools — get_coverage_stats, get_leaderboards, get_agent_summary and get_network_teaser — each carrying a real inputSchema and an upgrade pointer to the paid x402 REST endpoint that returns the enriched data. prompts/list and resources/list return empty arrays; a request without Accept text/event-stream is refused with 406. humanURL: https://onchainagentintel.io/docs baseURL: https://api.onchainagentintel.io/mcp tags: - MCP - Agent-Native - Agent Intelligence tags_raw: - MCP - agent-native - Agent Intelligence properties: - type: MCPServer url: mcp/onchainagentintel-io-mcp.yml - type: MCPServer name: MCP endpoint (Streamable HTTP) url: https://api.onchainagentintel.io/mcp - type: ToolCrosswalk url: mcp/onchainagentintel-io-tool-crosswalk.yml - aid: onchainagentintel-io:agent-zero-a2a-agent name: Agent Zero A2A Agent description: >- 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.onchainagentintel.io/a2a/v1 and sixteen skills — x402 settlement, the free MCP server, the nine paid intel services, smart-contract audit, ERC-8183 evaluation and the free public surfaces — under a required a2a-x402 v0.2 payment extension settled to a Safe on Base or Ethereum. The card carries capabilities as an object and skills as an array but no top-level protocolVersion, so it grades flavored against A2A 1.0.0; the legacy /.well-known/agent.json declares protocolVersion 0.3.0. Streaming and push notifications are declared unsupported. humanURL: https://onchainagentintel.io/docs baseURL: https://api.onchainagentintel.io/a2a/v1 tags: - A2A - Agent-Native - x402 tags_raw: - A2A - agent-native - x402 properties: - type: AgentCard url: a2a/onchainagentintel-io-a2a.yml - type: AgentCard name: A2A Agent Card (provider-hosted) url: https://onchainagentintel.io/.well-known/agent-card.json - aid: onchainagentintel-io:onchainagentintel-io-paid-x402-api name: Agent Zero Paid X402 API description: Paid endpoints — settle with X-PAYMENT header per x402. humanURL: https://onchainagentintel.io/docs baseURL: https://api.onchainagentintel.io tags: - paid-x402 properties: - type: OpenAPI url: openapi/onchainagentintel-io-paid-x402-api-openapi.yml - type: Documentation url: https://onchainagentintel.io/docs - type: APIReference url: https://api.onchainagentintel.io/v1/public/docs - type: GettingStarted url: https://onchainagentintel.io/docs#quickstart - type: Authentication url: authentication/onchainagentintel-io-authentication.yml - type: Conventions url: conventions/onchainagentintel-io-conventions.yml - type: Idempotency url: conventions/onchainagentintel-io-conventions.yml - type: ErrorCatalog url: errors/onchainagentintel-io-problem-types.yml - type: Lifecycle url: lifecycle/onchainagentintel-io-lifecycle.yml - type: ChangeLog url: changelog/onchainagentintel-io-changelog.yml - type: Conformance url: conformance/onchainagentintel-io-conformance.yml - type: DataModel url: data-model/onchainagentintel-io-data-model.yml - type: Components url: components/onchainagentintel-io-components.yml - type: Plans url: plans/onchainagentintel-io-plans-pricing.yml - type: RateLimits url: rate-limits/onchainagentintel-io-rate-limits.yml - aid: onchainagentintel-io:onchainagentintel-io-public-api name: Agent Zero Public API description: Free endpoints — no payment, no auth. humanURL: https://onchainagentintel.io/docs baseURL: https://api.onchainagentintel.io tags: - public properties: - type: OpenAPI url: openapi/onchainagentintel-io-public-api-openapi.yml - type: Documentation url: https://onchainagentintel.io/docs - type: APIReference url: https://api.onchainagentintel.io/v1/public/docs - type: GettingStarted url: https://onchainagentintel.io/docs#quickstart - type: Authentication url: authentication/onchainagentintel-io-authentication.yml - type: Conventions url: conventions/onchainagentintel-io-conventions.yml - type: Idempotency url: conventions/onchainagentintel-io-conventions.yml - type: ErrorCatalog url: errors/onchainagentintel-io-problem-types.yml - type: Lifecycle url: lifecycle/onchainagentintel-io-lifecycle.yml - type: ChangeLog url: changelog/onchainagentintel-io-changelog.yml - type: Conformance url: conformance/onchainagentintel-io-conformance.yml - type: DataModel url: data-model/onchainagentintel-io-data-model.yml - type: Components url: components/onchainagentintel-io-components.yml - type: Plans url: plans/onchainagentintel-io-plans-pricing.yml - type: RateLimits url: rate-limits/onchainagentintel-io-rate-limits.yml maintainers: - FN: Kin Lane email: kin@apievangelist.com - FN: APIs.json email: info@apis.io common: - type: Overlay url: overlays/onchainagentintel-io-openapi-overlay.yaml - type: AgentSkill url: https://onchainagentintel.io/.agents/skills/onchain-agent-intel/SKILL.md - type: DomainSecurity url: security/onchainagentintel-io-domain-security.yml - type: Website url: https://onchainagentintel.io/ - type: Documentation url: https://onchainagentintel.io/docs - type: APIReference url: https://api.onchainagentintel.io/v1/public/docs - type: Pricing url: https://onchainagentintel.io/services - type: Blog url: https://onchainagentintel.io/blog - type: BlogRSS url: https://onchainagentintel.io/feed.xml - type: Login url: https://app.onchainagentintel.io/ - type: AgentCard url: a2a/onchainagentintel-io-a2a.yml - type: MCPServer url: mcp/onchainagentintel-io-mcp.yml - type: WellKnown url: well-known/onchainagentintel-io-well-known.yml - type: LLMsTxt url: llms/onchainagentintel-io-llms.txt - type: LLMsTxt name: llms.txt (provider-hosted) url: https://onchainagentintel.io/llms.txt - type: AgentSkill url: skills/_index.yml - type: Conformance url: conformance/onchainagentintel-io-conformance.yml x-enrichment: date: '2026-09-19' status: enriched artifacts_added: 23 pass: local-v3 x-a2a: verified: true probed: '2026-09-26' url: "https://onchainagentintel.io/.well-known/agent-card.json" grade: "flavored" protocol_version: "2.0" control: 200