Know before your agent pays.

Trust score (0-100, A-F) for any listed x402 endpoint: uptime, envelope compliance, latency, age, on-chain settlement activity, price stability. Deterministic, auditable breakdown. Re-probes live if the cache is stale.

Raw observation time-series: listing/delisting, price changes, payTo changes, probe results. Up to 90 days back.

Semantically similar endpoints that out-score a given one. Up to 25 alternatives with score, grade, similarity, price, and per-endpoint page; same-host siblings and avoid-flagged endpoints are excluded.

Meaning-based search across the whole catalog: describe the capability you need, get the up to 25 closest endpoints ranked by cosine similarity, then trust score. Discovery only: score and grade per match, but no verdict or flags; use /v1/x402-trust for those.

Monitor one endpoint for 30 days: alerts on payTo change (possible rug/takeover), price, asset/network change, spec regressions, delisting, and liveness. Push to up to 5 webhook + 5 Slack/Discord URLs, all connection-tested before you are charged. Edit or cancel anytime via PATCH/DELETE; response includes a one-time secret and machine-readable next_steps.

Score many endpoints in one call from cached snapshots; rows older than ~15 min are recomputed on demand (no live probe, cap 50 endpoints per 8 s). Returns full trust reports plus a per-row recomputed flag. Tiers: 10→$0.045 · 50→$0.20 · 100→$0.325 · 200→$0.40 · 500→$0.50.

Aggregate snapshot of the x402 ecosystem (Base + Solana): listed, active and delisted endpoints, reachability, 402-envelope compliance, and real on-chain USDC settlement volume, receivers and payers over 30 days.

Most reliable x402 hosts (providers) by trust score, refreshed continuously. Each host score is the probe-weighted mean of its listed endpoints, so one provider cannot flood the board with path variants. Paged: limit (max 25) + offset over the materialized top-100 board.

Substring search over host, resource URL and service name across the whole catalog (listed and delisted), the lookup for "every endpoint of this domain" that the semantic search does not answer. Paged with limit (max 25) + offset plus total; rows carry cached score/grade and delisted and provider-verified marks. Verdict details stay paid-report content.

Hosts that completed provider verification (domain key file plus confirmed contact email), with their published profile and probe-weighted host score. Paged with limit (max 25) + offset. Informational only, verification never changes a score.

Who settles the x402 economy: every known facilitator ranked by real on-chain USDC settlement volume (30d + all-time), per-network breakdown, settler addresses and trends. JSON at /v1/facilitators.

Three complete trust reports for fixed endpoints (best, median, and worst of the current population), so you see exactly what the paid output looks like across the quality range before you pay.