Agent & Infrastructure

Echo text with length (probe channel 1). Call when you verify x402 pay→deliver wiring with a trivial payload. Returns echo text, length, echo=1 for $0.001 USDC via x402 on Base. No network, no keys, no retention; first-party local JSON only. Results are advisory; the caller owns budgets, auth, and production controls.

Echo text with length (probe channel 2). Call when you verify a second pay→deliver path with a trivial payload. Returns echo text, length, echo=2 for $0.001 USDC via x402 on Base. No network, no keys, no retention; first-party local JSON only. Results are advisory; the caller owns budgets, auth, and production controls.

Validate http(s) URL shape. Call when you preflight agent-held URLs before fetch/extract. Returns valid boolean for $0.001 USDC via x402 on Base. No network, no keys, no retention; first-party local JSON only. Results are advisory; the caller owns budgets, auth, and production controls.

Card BIN Lookup x402 — BIN lookup - resolve issuer, scheme, type and country for a card BIN

Best execution price across DEXs on Polygon PoS - which DEX is cheapest to buy on and which pays most to sell into. Compares live prices across QuickSwap, SushiSwap and Uniswap v3 and returns the buy venue, the sell venue, the cross-exchange spread in bps, the fee-adjusted gross arbitrage spread and an optimal trade size. Smart order routing and cross-DEX arbitrage data for trading and execution agents on Polygon / MATIC / POL.

Retrieves recovery assistance or troubleshooting guidance for base-level agent issues.

x402 protocol check: confirms payment and returns a timestamp. Returns no data — for real data see GET /dao-proposals.

Task router: describe what you need in plain text (?task=...) and get the exact Vedetta endpoint, parameters and price to call — plus cheaper cached alternates. Stops agents guessing or overpaying. Half a cent, instant, never fires a live analyst read. Descriptive research, not financial advice.

Search x402 Resources

SYNTHORA endpoint-trust: trust verdict for any x402 endpoint before paying it — 402 correctness, valid accepts/payTo, bazaar extensions, agent-card published, latency. Observed behavior, not declarations. The pre-payment check for buying agents. $0.005 USDC x402 Base.

Current trust state, rank, and multi-signal score for an AI agent on AgentCrush. Updated every 4 hours.

Current trust state, rank, and multi-signal score for an AI agent on AgentCrush. Updated every 4 hours.

EconDash economic data API (M2M)

EconDash economic data API (M2M)

EconDash economic data API (M2M)

Live health check of any x402 endpoint BEFORE you pay it: probes the URL right now and reports alive/dead, HTTP status, latency in ms, whether the paywall responds correctly, and the current declared price, asset, network and payTo parsed from its 402 response. Avoid paying dead or misconfigured endpoints — x402 payments have no refunds.

Returns whether a specific accessory is compatible with a specific device, along with a confidence score and source citation. Accepts GET (query params) or POST (JSON body) — POST is used by x402 payment clients. Where a pair is covered by

Daily state of the x402 agent economy: observed USDC inflow, seller ranking, category demand, growth, and coverage. Reports its real observation window; concentration adjustment applied only when scan coverage supports it.

Leaderboard of x402 sellers by observed USDC inflow, with distinct payers, an HHI concentration measure and wash-risk flags. Sellers below the observation floor are returned unrated, not accused. The payer-graph discount applies only where wallet scan coverage supports it. HHI measures concentration, not common control.

x402 services first listed since a given date, with first archive observation and conservative early-traction evidence from observed inflow. Entrants MCPFax can attribute — a declared payTo, an observed title, or observed inflow — rank first, and each row states which it carries. A window identifying nobody is refused 422 and charges nothing. Requests before the archive's first date are reported as partially covered. Use this for deal flow on who just entered the market.

x402dir facilitator recommender: pick the best x402 payment facilitator by chain, token, and monthly volume. Returns ranked facilitators with fee estimates (JSON).

Structured feed of regulatory changes affecting AI systems: jurisdiction, instrument, change type, effective dates, comment deadlines. Curated by the team behind The Attestation Brief; every item attested on ingest.

Monitor ONE x402 endpoint for 30 days and get alerted on changes that break agents: payTo changes (critical — possible takeover/rug), price changes, asset/network changes, 402-spec regressions, delisting, and liveness (down/recovered). Account-free: pay, receive a one-time secret + poll URL. Push to multiple signed HTTPS webhooks and/or Slack/Discord incoming webhooks (up to 5 each per watch). Every push URL is connection-tested before payment — unreachable URLs are rejected with no charge. Edit URLs or cancel early for free via bearer-authed PATCH/DELETE /v1/watch/{id}. Poll the append-only event log; nothing is lost between polls.

x402 PayTo Pre-Flight: verify a payTo address against the live registry before paying. Detects payTo hijacking, stale endpoints and unknown resources. Deterministic, <200ms, no external network. 0.001 USDC via x402 on Base. SYNTHORA.