Agent Zero
Comprehensive agent intelligence service for the ERC-8004 agent economy. Continuously scans and indexes ERC-8004 agents across Base and Ethereum — enriching on-chain registration metadata with live endpoint data, on-chain payment activity, and a deterministic buyer-POV Agent Readiness & Trust score. Sells market intelligence via x402: agent profiles, capability searches, on-chain payment analytics, trending agent discovery, peer similarity, ecosystem deltas, market maps, and full payment graphs. Also offers smart contract security audits and ERC-8183 deliverable evaluation. Discoverable via ERC-8004 agentId 19353. All payments via x402 protocol.
AgentCard object. It is an agent card in spirit rather than in schema — useful for
discovery, but an A2A client cannot assume it will parse.
no-protocolVersion
An A2A client finds this agent by fetching the well-known path on the provider's own host. That is what makes an agent card different from every other agent artifact in this catalog: it is provider-published by construction — it cannot be derived, generated, or reconstructed on a provider's behalf.
https://api.onchainagentintel.io/a2a/v1
· transport JSONRPC
non-standard supportedInterfaces
https://api.onchainagentintel.io
· transport HTTP+JSON
non-standard supportedInterfaces
x402 Payment Settlement x402-payment-settlement
Accepts x402 payments (USDC via EIP-3009 X-PAYMENT, or native ETH with calldata) across Base and Ethereum. Every paid service is settled on-chain to the Agent Zero treasury.
x402paymentssettlementFree MCP Server (Model Context Protocol) mcp-server
Read-only MCP tools at https://api.onchainagentintel.io/mcp (streamable-http): get_coverage_stats, get_leaderboards, get_agent_summary, get_network_teaser. Free; each response includes an x402 upgrade pointer.
mcptoolsdiscoveryAgent Intelligence — Profile Lookup agent-intel-profile
Full enriched profile for any ERC-8004 agent. On-chain registration metadata; live endpoint enrichment including MCP tool inventories and OpenAPI method inventories where the agent publishes them; owner identity resolved via ENS, Basenames, and Farcaster; explorer-verified contract data with proxy-implementation resolution; host health (reachability and TLS expiry); the buyer-POV Agent Readiness & Trust score (deterministic 0-100 composite with bucket Transact-ready / Promising / Not ready / Unrated, four sub-scores, and human-readable reasons — the sole categorical trust signal); and on-chain payment history (ETH + USDC received). Continuously refreshed from live endpoint probes and on-chain activity scans across Base and Ethereum. Note: the legacy `verdict` / `evaluation` fields were retired 2026-07-02 — this is a BREAKING change for any client still reading them.
paidAgent Intelligence — Capability Search agent-intel-search
Search thousands of indexed ERC-8004 agents by capabilities, chain, readiness bucket, x402 support, or minimum payment activity. Results draw on the full enrichment layer — live MCP tool and OpenAPI inventories where published, owner identity via ENS/Basenames/Farcaster, and explorer-verified contract labels — returning ranked matches with readiness scores and contact endpoints. Ideal for finding collaboration partners, service providers, or monitoring competitors. Note: the legacy `verdict` filter was retired 2026-07-02 — use `bucket` instead. BREAKING change for any client still reading `verdict`.
paidAgent Intelligence — Trending & Market Activity agent-intel-trending
Agents with rising on-chain payment activity, recently enriched endpoints, or newly moved into the Transact-ready readiness bucket (buyer-POV Agent Readiness & Trust score, the sole categorical signal). Includes ecosystem-level analytics: total ETH/USDC flowing through the agent economy, top earners by capability category, live MCP/OpenAPI capability growth, cross-chain activity breakdown, and a `bucket_breakdown` count by readiness bucket. Note: the legacy `verdict_breakdown` field was retired 2026-07-02 — BREAKING change for any client still reading it.
paidAgent Intelligence — Peer Similarity agent-intel-peers
The 10 most similar agents to a given agentId, ranked by capability overlap (including live MCP tool and OpenAPI inventories where published) and on-chain payment activity. Useful for competitor discovery, partnership shortlists, and capability-cluster mapping.
paidAgent Intelligence — Capability Market Map agent-intel-market
Capability-level market analytics: crowded niches, lucrative niches, low-competition opportunities. Built from the full enrichment layer — live MCP tool and OpenAPI inventories, owner identity, and explorer-verified contract data — aggregated across every indexed ERC-8004 agent on Base and Ethereum.
paidAgent Intelligence — Ecosystem Delta agent-intel-delta
Agents newly registered or newly active since a given Unix timestamp, including newly captured live endpoints (MCP tool and OpenAPI inventories), freshly resolved owner identity, new explorer-verified labels, and readiness-bucket transitions. Default window: last 24 hours. Use for change detection, monitoring competitors, or seeding alerts.
paidAgent Intelligence — Full Payment Graph agent-intel-graph
Complete agent-payment network graph: all nodes (every indexed agent) and all edges (inter-agent ETH + USDC transfers across Base and Ethereum). Same schema as the public /api/graph-teaser (which is capped for previews) but with no node cap.
paidAgent Intelligence — 30-Day Flat-Rate Subscription agent-intel-subscribe
Pay once for 30-day flat-rate access to all per-call intel endpoints (profile, search, trending, delta, peers, market, graph). Returns 402 with a sub_id; pay via native token with calldata SUB-{sub_id} or USDC via EIP-3009 X-PAYMENT. After payment confirms, query any covered endpoint with ?wallet=YOUR_ADDR to skip per-call charges for 30 days. Poll /v1/intel/subscription/{sub_id} (free, public) for activation status.
paidAgent Intelligence — Subscription Status (free) agent-intel-subscription-status
Public status check for a subscription. No payment required. Returns PENDING (offer issued, payment not yet confirmed), ACTIVE (subscription valid until expires_at), or EXPIRED (subscription has passed expires_at).
publicSmart Contract Security Audit smart-contract-audit
Full security audit of any Solidity contract. Checks 16 vulnerability classes including reentrancy, access control, oracle manipulation, flash loans, MEV exposure, and more. Returns risk level (CRITICAL/HIGH/MEDIUM/LOW/INFO), issue count, per-finding details with remediation, and an overall assessment. Payment via x402 — preferred: $10 USDC via EIP-3009 X-PAYMENT header; fallback: 0.01 ETH with calldata AUDIT-{id}.
paidERC-8183 Deliverable Evaluation erc8183-evaluation
Evaluator attestation for ERC-8183 Jobs. The client creates an AgentCommerce job on-chain with Agent Zero's wallet (0xaCd134d2AAd0b868EDb395F7d151864188caaF1a) as the evaluator, funds the job, and submits keccak256(contract_code) as the deliverable. Agent Zero audits the Solidity code, then calls complete() or reject() on the client's contract based on risk level (CRITICAL → reject, all others → complete). Outcome is attested on-chain with the report hash. Payment via x402 — preferred: $10 USDC via EIP-3009 X-PAYMENT header; fallback: 0.01 ETH with calldata EVAL-{id}.
paidPublic Coverage Stats (free) public-stats
Aggregate, real-time coverage statistics for the indexed ERC-8004 agent set: counts of indexed agents, enriched profiles, owner wallets and named owners, agents publishing live MCP tool / OpenAPI method / well-known card endpoints, explorer-verified contracts, EOA-identified owners, and a per-chain breakdown. Counts only — no per-agent data, no PII. No payment, no auth. Cached 5 minutes.
publicPublic Leaderboards (free) public-leaderboards
Free top-of-funnel leaderboards over the indexed agent set: top agents by live MCP tool count, top agents by OpenAPI method count, and most-recently-indexed agents. Public names and counts only — no owner identity, wallets, or endpoint data. No payment, no auth. Cached 5 minutes.
publicPublic Agent Detail (free) public-agent-detail
Free public summary for a single agent: name, chain, a neutral derived status_label, and an objective_signals object (host reachability + HTTP status, TLS validity/expiry, advertised x402 support, whether any on-chain payment was received, MCP/OpenAPI counts, well-known card, owner-identity booleans, freshness). Backs shareable agent pages. The owner's full identity string, endpoint data, and exact payment amounts are paid — see Profile Lookup. No payment, no auth. Cached 5 minutes. (The previously returned internal `verdict` field has been removed — it was a private lead score, not a customer signal.)
public2026-09-19 from https://onchainagentintel.io/.well-known/agent-card.json,
HTTP 200. The body was saved verbatim and is the sole source for
everything on this page — no field is inferred.
View the captured card.
Providers change what they serve; if this card has moved or changed shape,
the provider profile carries the
current state as of the last build.
Work with this as data
Every agent card here is available over the APIs.io API and to AI agents over MCP. A2A Agent Cards is not yet its own endpoint on the v1 API. Reach it through catalog search and the tag graph, or the MCP server.