x402-protocol-integration

Get the signed comparison of five paid search services for the documented Coinbase x402 documentation task. Use optional date. Receive selected_date, available_dates, comparison data, sha256, signer, and signature_scheme as JSON.

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.

Octodamus Derivatives Guide -- pay-per-call x402 endpoint on Base. Preview: https://api.octodamus.com/v2/guide/derivatives/preview

Screen an untrusted path for traversal signals without returning secret data. Use it as a bounded preflight or analysis step inside an enterprise agent workflow before data, policy, integration, security, or commercial decisions reach production. Returns deterministic machine-readable JSON for $0.003 USDC via x402 on Base. Execution is first-party, local-only, stateless, memory-only, and has no paid upstream or input retention. Results are advisory; the caller remains responsible for authorization and production controls.

Octodamus NYSE Tech Gas Optimizer -- pay-per-call x402 endpoint on Base. Preview: https://api.octodamus.com/v2/nyse_tech/gas_settlement_optimizer/preview

0xBs public x402 demo — USDC on Base for agent-payable ESP32 hardware.

x402 seller liveness & conformance probe (0.001 USDC): reachability + quantified 402 conformance score (0-100, per-check evidence) + silent-drift detection vs previous 1h snapshot (payTo/amount/conformance change) of top active sellers, for buyer-agent endpoint selection

funded x402 seller leaderboard (0.001 USDC): active PayAI Bazaar sellers with real Base USDC principal + 30d on-chain settlement attestation (tx_30d), live verified [nohumans.directory paid-verified: real USDC purchase settled on-chain by third-party scout wallet 2026-09-25]

x402 catalog observatory: factual liveness of the ~200 most recently updated Bazaar listings, probed in rotation (~2h cadence). Per-endpoint HTTP code, latency, last-OK time, consecutive fails. No payments made by probes; no judgements — measurements only. Free aggregate view: gblin-mcp.gblin-mcp-worker.workers.dev/catalog

Octodamus NYSE Tech DTC Pipeline Subscribe -- pay-per-call x402 endpoint on Base. Preview: https://api.octodamus.com/v2/nyse_tech/dtc_pipeline/subscribe/preview

Should my agent pay this expensive x402 endpoint? The pre-payment verdict plus the full diagnosis, the 30-day history per day, how reliable the seller's other endpoints are and whether the endpoint moved domains. Never pays the endpoint.

Why is my x402 endpoint broken? Diagnose and debug an x402 payment endpoint (or MCP server) when payments fail: checks the 402 challenge, accepts[] (network, payTo, amount, asset), resource URL, Solana settlement readiness, which wallets and agents can pay, Bazaar/OpenAPI discovery and the browser paywall. Returns every check with a fix hint. Read-only: never pays.

Why is my x402 endpoint broken? Diagnose and debug an x402 payment endpoint (or MCP server) when payments fail: checks the 402 challenge, accepts[] (network, payTo, amount, asset), resource URL, Solana settlement readiness, which wallets and agents can pay, Bazaar/OpenAPI discovery and the browser paywall. Returns every check with a fix hint. Read-only: never pays.

Paid x402/MCP/A2A/Bazaar consult. Wisdom envelope: verdict, implementation_prompt, risk, citations, receipt.

Answer what a named x402 route charged and when its price changed. Use url and optional method. Receive stored observations, consecutive price changes, current price, coverage dates, and observation age. Only exact URLs in completed CDP Bazaar snapshots have an answer. Live store depth: 7703197 observations over 49911 routes, from 2026-08-19T21:49:59.819337Z through 2026-10-06T00:04:48.416051Z.

Atlas — independent paid-test map of x402 services: every verified service + response samples + avoid-list, each with on-chain receipts. Free human-readable reports: https://402atlas.com/report.html and https://402atlas.com/market-report.html (audit / discovery layer, not a task service)

Find x402 payer matches on Base. Use rail=x402 and optional payer. Known scan-coverage gaps affect Base blocks 50248224-50547055 and 50828556-50868261. The older range has endpoint observations but no completed interior scan. Payer counts, membership, amounts, and times describe stored matches and can be incomplete. Stored observations: 853265. Payer wallets: 10686. Listed receivers: 1368. First stored observation: 2026-08-21T04:14:57Z. Last stored observation: 2026-10-04T01:40:55Z.

Rank x402 Arena agents and niches by observed self-reported organic purchases while excluding house-funded activity.

OpenAI-compatible chat completions over x402 (local GPU models, no API key) — Genesis402 / UnyKorn Operator Network

OpenAI-compatible text embeddings over x402 (768-dim, up to 32 inputs per call) — Genesis402 / UnyKorn Operator Network

Test endpoint for verifying x402 payment integration end to end. Returns a static greeting in the Agent Tollbooth standard response envelope. Not a data product — use it to smoke-test your x402 client for $0.001 before calling our compliance endpoints: OFAC sanctions screening ($0.01) and FDIC bank verification ($0.01), listed under this same payTo address.

Base latest block number + timestamp — a chain-head freshness probe. Pay-per-call via x402.

Transaction status on Base — success/failed, block, confirmations, gas, from/to. A pending/unknown tx returns 404 (not charged). Pay-per-call via x402. An empty body is answered for the latest transaction on Base (read live from the chain head); send {"txHash":"0x…"} for any other transaction.

ETH balance of any address on Base (wei + ETH). Pay-per-call via x402. An empty body is answered for the wallet that pays (the payment's signer); send {"address":"0x…"} for any other address.