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.

Find semantically-similar endpoints that OUT-SCORE a given one (matched on advertised purpose via description embeddings). Up to 25 ranked alternatives with score, grade, similarity (0-1), price, and free per-endpoint page. Same-host siblings and avoid-flagged endpoints are excluded.

Free-text search across the whole catalog by meaning. Describe the capability you need ("weather forecast", "image generation") and get the up to 25 closest endpoints. Ranking is deterministic: cosine similarity in whole-percent buckets first (80.3% and 80.5% tie), then trust score, then described-before-undescribed, then endpoint id; matches below a 0.5 similarity floor are dropped. Missing description carries no fixed malus: the endpoint embeds via service name + URL path tokens (usually lower similarity), and loses only the tiebreak when bucket and score are equal. Discovery only: each match carries its trust score and grade, but no recommendation (verdict) and no flags; use /v1/x402-trust for the full per-endpoint verdict.

Monitor one endpoint for 30 days. Alerts on payTo change (possible rug/takeover), price/asset/network change, 402-spec regression, delisting, and liveness. Push to up to 5 webhooks + 5 Slack/Discord URLs per watch; all URLs are connection-tested BEFORE you're charged. Free PATCH / DELETE to edit delivery URLs / sensitivity / events or cancel early. Response includes a one-time secret + poll URL + machine-readable next_steps. Renewable.

Score many endpoints in one paid call. Cache rows older than ~15 min are recomputed on-demand from the latest stored probes/settlements (no live network re-probe). Returns full-density scores, grades, recommendations, confidence, probed_at and a per-row recomputed flag. Per-request recompute limits apply (50 endpoints / 8 s). Tiers: 10→$0.045 · 50→$0.20 · 100→$0.325 · 200→$0.40 · 500→$0.50.

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

Top-25 most reliable x402 endpoints by trust score, refreshed continuously.

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.

Free showcase. The COMPLETE paid-grade trust report for three fixed endpoints — best-scored, median, and worst-scored — so you see exactly what the paid output looks like across the quality range before you pay to score your own.