402xAgent

Quality 66 / 100needs work

7 tools, about 2,581 tokens to load them all · tool set 97fb9bba8e23 · tools last changed 2026-10-16 · checked 2026-10-19 10:52 UTC

Tool changes

• 2026-10-16payment_statusadded

  After you pay an x402 endpoint (Base USDC, EIP-3009 exact): did the payment land, and is it safe to sign a new one? Give payment_payload (the base64 PAYMENT-SIGNATURE you sent), or tx_hash, or from + nonce (+ valid_before). Returns status landed|not_landed|pending|canceled|unknown, safe_to_retry_same_payload (always true: a nonce is single-use), safe_to_resign (true only when two independent RPC sources agree the nonce is unused AND validBefore has passed), tx details, terms match, a claim pointer and a signed receipt. Same 5 free per UTC day as endpoint_spot_check (client=vc-mcp), then $0.02 USDC on Base via x402 (forward PAYMENT-SIGNATURE).

• 2026-10-16endpoint_spot_checkchangeddescription
  before

  Decision-shaped SSRF-safe 402xAgent check of a public URL for an x402 PAYMENT-REQUIRED / 402 challenge. Every answer has reason_code (stable code) and confidence (high|medium|low); rules: https://402xagent.com/rules.json. History: stable_for_days, last_changed, drift. Free: verdict (pay|skip|recheck), a plain-words reason, payment_terms_sha256 (hash of the approved payment), and access. Paid: verdict, reason code, quoted/claimed price, pay_to, network, asset, and payment = the exact {network, asset, amount_atomic, amount_usd, pay_to} a router may sign (verdict pay only), plus access with the settlement tx. No 402 terms is skip/no_paywall (recheck/free_trial_active when the target sends x-free-trial headers); recheck only for timeouts, 5xx and network errors; wrong or unsupported network, non-canonical USDC or a pay_to that differs from the listing is skip. The same normalized URL + method reuses one probe for 5 min, so consecutive calls agree. mode=dry-run: free dry run (nothing signed or paid, stored as a public receipt, no approval hash, 50/caller/day). Never pays the target (probe GET only). 5 free checks per client per UTC day (at most 25 per network) (client=vc-mcp), then $0.01 to $0.25 USDC (one tenth of the target's quoted price) on Base via x402. Unpaid after free quota: payment instructions. Forward PAYMENT-SIGNATURE for a paid check.

  after · 97% of words in common

  Decision-shaped SSRF-safe 402xAgent check of a public URL for an x402 PAYMENT-REQUIRED / 402 challenge. Every answer has reason_code (stable code) and confidence (high|medium|low); rules: https://402xagent.com/rules.json. History: stable_for_days, last_changed, drift. Free: verdict (pay|skip|recheck), a plain-words reason, payment_terms_sha256 (hash of the approved payment), and access. Paid: verdict, reason code, quoted/claimed price, pay_to, network, asset, and payment = the exact {network, asset, amount_atomic, amount_usd, pay_to} a router may sign (verdict pay only), plus access with the settlement tx. No 402 terms is skip/no_paywall (recheck/free_trial_active when the target sends x-free-trial headers); recheck only for timeouts, 5xx and network errors; wrong or unsupported network, non-canonical USDC or a pay_to that differs from the listing is skip. The same normalized URL + method reuses one probe for 5 min, so consecutive calls agree. mode=dry-run: free dry run (nothing signed or paid, stored as a public receipt, no approval hash, 50/caller/day). Never pays the target (probe GET only). 5 free checks per client per UTC day (at most 25 per network) (client=vc-mcp), then $0.02 USDC a check on Base via x402. Unpaid after free quota: payment instructions. Forward PAYMENT-SIGNATURE for a paid check.

• 2026-10-10endpoint_spot_checkchangeddescription
  before

  Decision-shaped SSRF-safe spot-check of a public URL for an x402 PAYMENT-REQUIRED / 402 challenge. Free: verdict (pay|skip|recheck), a plain-words reason, payment_terms_sha256 (hash of the approved payment), and access. Paid: verdict, reason code, quoted/claimed price, pay_to, network, asset, and payment = the exact {network, asset, amount_atomic, amount_usd, pay_to} a router may sign (verdict pay only), plus access with the settlement tx. Never pays the target (probe GET only). 1 free check per client per UTC day (client=vc-mcp), then $0.01 to $0.25 USDC (one tenth of the target's quoted price) on Base via x402. Unpaid after free quota: payment instructions. Forward PAYMENT-SIGNATURE for a paid check.

  after · 87% of words in common

  Decision-shaped SSRF-safe spot-check of a public URL for an x402 PAYMENT-REQUIRED / 402 challenge. Free: verdict (pay|skip|recheck), a plain-words reason, payment_terms_sha256 (hash of the approved payment), and access. Paid: verdict, reason code, quoted/claimed price, pay_to, network, asset, and payment = the exact {network, asset, amount_atomic, amount_usd, pay_to} a router may sign (verdict pay only), plus access with the settlement tx. A 2xx with no payment terms is recheck (reason no_terms_seen, or free_trial_active when the target sends x-free-trial headers), not skip. Never pays the target (probe GET only). 1 free check per client per UTC day (client=vc-mcp), then $0.01 to $0.25 USDC (one tenth of the target's quoted price) on Base via x402. Unpaid after free quota: payment instructions. Forward PAYMENT-SIGNATURE for a paid check.

• 2026-10-09endpoint_spot_checkchangeddescription, input schema
  before

  Decision-shaped SSRF-safe spot-check of a public URL for an x402 PAYMENT-REQUIRED / 402 challenge. Returns only verdict (pay|skip|recheck), reason, quoted_price_usd, claimed_price_usd, and access. Never pays the target (probe GET only). 1 free check per client per UTC day (client=vc-mcp), then $0.01 to $0.25 USDC (one tenth of the target's quoted price) on Base via x402. Unpaid after free quota: payment instructions. Forward PAYMENT-SIGNATURE for a paid check.

  after · 76% of words in common

  Decision-shaped SSRF-safe spot-check of a public URL for an x402 PAYMENT-REQUIRED / 402 challenge. Free: verdict (pay|skip|recheck), a plain-words reason, payment_terms_sha256 (hash of the approved payment), and access. Paid: verdict, reason code, quoted/claimed price, pay_to, network, asset, and payment = the exact {network, asset, amount_atomic, amount_usd, pay_to} a router may sign (verdict pay only), plus access with the settlement tx. Never pays the target (probe GET only). 1 free check per client per UTC day (client=vc-mcp), then $0.01 to $0.25 USDC (one tenth of the target's quoted price) on Base via x402. Unpaid after free quota: payment instructions. Forward PAYMENT-SIGNATURE for a paid check.

• 2026-10-09get_receiptadded

  Free: read a public Spot-Check receipt. Give id (sc-... from endpoint_spot_check's receipt_id, or a 10-hex crawl id) or url (latest live + crawl receipt for that URL). Receipts hold the listing URL, the live 402 terms, verdict, reason, timestamp. Does not run a fresh check (use endpoint_spot_check for that).

• 2026-10-08endpoint_spot_checkchangeddescription
  before

  Decision-shaped SSRF-safe spot-check of a public URL for an x402 PAYMENT-REQUIRED / 402 challenge. Returns only verdict (pay|skip|recheck), reason, quoted_price_usd, claimed_price_usd, and access. Never pays the target (probe GET only). 1 free check per client per UTC day (client=vc-mcp), then $0.25 USDC on Base via x402. Unpaid after free quota: payment instructions. Forward PAYMENT-SIGNATURE for a paid check.

  after · 92% of words in common

  Decision-shaped SSRF-safe spot-check of a public URL for an x402 PAYMENT-REQUIRED / 402 challenge. Returns only verdict (pay|skip|recheck), reason, quoted_price_usd, claimed_price_usd, and access. Never pays the target (probe GET only). 1 free check per client per UTC day (client=vc-mcp), then $0.01 to $0.25 USDC (one tenth of the target's quoted price) on Base via x402. Unpaid after free quota: payment instructions. Forward PAYMENT-SIGNATURE for a paid check.

• 2026-10-06endpoint_spot_checkchangeddescription, input schema
  before

  SSRF-safe spot-check of a public URL for an x402 PAYMENT-REQUIRED / 402 challenge. Returns reachable, http_status, latency_ms, parsed accepts summary, quoted_price_usd, and optional price_matches_claimed. Never pays the target (probe GET only). 1 free check per client per UTC day (client=vc-mcp for this tool), then $0.25 USDC on Base via x402. Unpaid after free quota: returns payment instructions + free remaining. Forward PAYMENT-SIGNATURE to run a paid check.

  after · 69% of words in common

  Decision-shaped SSRF-safe spot-check of a public URL for an x402 PAYMENT-REQUIRED / 402 challenge. Returns only verdict (pay|skip|recheck), reason, quoted_price_usd, claimed_price_usd, and access. Never pays the target (probe GET only). 1 free check per client per UTC day (client=vc-mcp), then $0.25 USDC on Base via x402. Unpaid after free quota: payment instructions. Forward PAYMENT-SIGNATURE for a paid check.

• 2026-10-06lookupchangeddescription, input schema, annotationsmeaning changed
  before

  Is an x402 endpoint reliable for a task at a price? Asks the catalog's lookup service for services matching a task at or under max_price_usd, sorted by known-answer pass rate over the last n paid calls, then price. Each result has its paid receipts (time, tx, Basescan link, charged, delivered, pass/fail), last check time and a stale flag. Services broken on the seller's side come back under facts_only, not sorted. Sends client=vc-mcp: 5 free lookups per UTC day for that client name, then the service answers HTTP 402 (x402, $0.02 USDC on Base), which this tool reports but does not pay. Payment never changes results, sort order or listings.

  after · 50% of words in common

  Rank x402 endpoints for a known task at or under a price: "which endpoint should I pay for task X at <= $Y?". Prefer it over search_catalog (keyword browsing, unranked) and get_service (one id's raw record). No auth or API key. Calls the hosted lookup service as client=vc-mcp; all MCP users share that client's 5 free lookups per UTC day (reset 00:00 UTC), after which the tool returns an error reporting the HTTP 402 ($0.02 USDC on Base via x402) and never pays. Returns results sorted by known-answer pass_rate over the last n paid calls, then price, each with price_usd, pass_rate, last_check_at, last_check, stale and receipts (time, tx, basescan_url, charged_usd, delivered, quality); seller-broken services come unsorted under facts_only. No match: empty results, matched 0. Needs task or endpoint; invalid params return an error. Payment never changes results.

• 2026-10-06get_servicechangeddescription, input schema, annotationsmeaning changed
  before

  Get the full catalog record for one service id, including its latest check and raw log link.

  after · 15% of words in common

  Fetch the complete catalog record for one known service id (e.g. from search_catalog or lookup results). Use search_catalog to find ids and lookup to rank services for a task; get_service has no per-call receipts, so for receipts with tx and Basescan links call lookup with endpoint=<id>. Read-only. No auth or API key; free, no quota (reads the same catalog snapshot as search_catalog). Returns the record as published: id, name, provider, category, description, endpoint, advertised_price (USD, atomic, asset, network), sample_request, tasks, quality_test (known-answer test, facts_only flag and reason), paid_receipts (count), latest (full last check incl. x402_challenge, error, raw_log_url), history_summary and page_url. Unknown or missing id: error "no service with id ...".

• 2026-10-06search_catalogchangeddescription, input schema, annotationsmeaning changed
  before

  Search pay-per-call (x402) agent services in the verified catalog. Returns factual latest-check results (reachable, latency, advertised vs quoted price). No grades.

  after · 18% of words in common

  Browse or keyword-search the verified catalog of pay-per-call (x402) agent services. Use it when you don't know the task name or want to see what exists; use lookup to rank endpoints for a known task at a max price, and get_service for one id's full record. Read-only. No auth or API key; free, no quota or per-client limit: it only reads the catalog snapshot (bundled catalog.json in the local server, the published catalog.json on remote /mcp). Returns {count, results, generated_at, note, methodology_url}; results are in catalog order, ungraded, each with id, name, category, endpoint, advertised_price_usd, page_url and latest (checked_at, reachable, http_status, latency_ms, quoted_price_usd, price_matches_listing, charged_price_usd, delivered_valid, raw_log_url). No match: count 0, empty results. A non-numeric max_price_usd or limit returns an error.

Showing the latest 10. Full history: list_changes · trend: quality JSON.

Checks run on what our credential-free, read-only probes observe; tools are never called and no code audit is performed. How it is computed.