x402 resource directory

Find paid HTTP operations and MCP tools by URL, host, method or tool name. Compare payment terms across networks and catalogs.

Distinct HTTP URLs
162,299
Distinct MCP URLs
43
Catalog observations
263,972
URLs with a 402 in 7 days
1,319
Network identifiers
181

These results as JSON · Clear filters

GET https://api.kit-rx.com/v1/rx/recalls · 10 observations
FDA drug recall enforcement reports from openFDA, newest report first, filtered by optional drug, brand or firm text (every word must match; brand names also match their RxNorm ingredients), look-back months and FDA classification (I, II, III). Entries include recall number, classification, status, product description, reason, recalling firm, distribution pattern, initiation and report dates (ISO) and voluntary or mandated status, plus counts by classification.

Kit Rx profile

  • Polygon · exact
    $0.0050 (USDC)
    Recipient 0xAf8E0A8a8A0A8f65831b2dD0FFe0c1B804698D70
    UltravioletaDAO · seen
  • Arbitrum · exact
    $0.0050 (USDC)
    Recipient 0xAf8E0A8a8A0A8f65831b2dD0FFe0c1B804698D70
    UltravioletaDAO · seen
  • Base · exact
    $0.0050 (USDC)
    Recipient 0xAf8E0A8a8A0A8f65831b2dD0FFe0c1B804698D70
    UltravioletaDAO · seen
  • Avalanche · exact
    $0.0050 (USDC)
    Recipient 0xAf8E0A8a8A0A8f65831b2dD0FFe0c1B804698D70
    UltravioletaDAO · seen
  • eip155:1329 · exact
    $0.0050 (USDC)
    Recipient 0xAf8E0A8a8A0A8f65831b2dD0FFe0c1B804698D70
    UltravioletaDAO · seen
  • Base · exact
    $0.0100 (USDC)
    Recipient 0xAf8E0A8a8A0A8f65831b2dD0FFe0c1B804698D70
    Dexter · seen
  • eip155:1329 · exact
    $0.0100 (USDC)
    Recipient 0xAf8E0A8a8A0A8f65831b2dD0FFe0c1B804698D70
    Dexter · seen
  • Arbitrum · exact
    $0.0100 (USDC)
    Recipient 0xAf8E0A8a8A0A8f65831b2dD0FFe0c1B804698D70
    Dexter · seen
  • Polygon · exact
    $0.0100 (USDC)
    Recipient 0xAf8E0A8a8A0A8f65831b2dD0FFe0c1B804698D70
    Dexter · seen
  • Avalanche · exact
    $0.0100 (USDC)
    Recipient 0xAf8E0A8a8A0A8f65831b2dD0FFe0c1B804698D70
    Dexter · seen
GET https://api.kit-rx.com/v1/rx/shortages · 10 observations
FDA drug shortage records from openFDA, most recently updated first, with optional drug-name and status filters (current, to be discontinued, resolved). Name filters match every word in generic name, brand or presentation, plus RxNorm ingredients for brand names. Entries give generic name, presentation, dosage form, status, availability, related info, reason, therapeutic category, company, ISO dates and package NDC, plus counts by status and an in_shortage flag.

Kit Rx profile

  • Polygon · exact
    $0.0050 (USDC)
    Recipient 0xAf8E0A8a8A0A8f65831b2dD0FFe0c1B804698D70
    UltravioletaDAO · seen
  • Arbitrum · exact
    $0.0050 (USDC)
    Recipient 0xAf8E0A8a8A0A8f65831b2dD0FFe0c1B804698D70
    UltravioletaDAO · seen
  • Avalanche · exact
    $0.0050 (USDC)
    Recipient 0xAf8E0A8a8A0A8f65831b2dD0FFe0c1B804698D70
    UltravioletaDAO · seen
  • Base · exact
    $0.0050 (USDC)
    Recipient 0xAf8E0A8a8A0A8f65831b2dD0FFe0c1B804698D70
    UltravioletaDAO · seen
  • eip155:1329 · exact
    $0.0050 (USDC)
    Recipient 0xAf8E0A8a8A0A8f65831b2dD0FFe0c1B804698D70
    UltravioletaDAO · seen
  • Avalanche · exact
    $0.0100 (USDC)
    Recipient 0xAf8E0A8a8A0A8f65831b2dD0FFe0c1B804698D70
    Dexter · seen
  • Polygon · exact
    $0.0100 (USDC)
    Recipient 0xAf8E0A8a8A0A8f65831b2dD0FFe0c1B804698D70
    Dexter · seen
  • Base · exact
    $0.0100 (USDC)
    Recipient 0xAf8E0A8a8A0A8f65831b2dD0FFe0c1B804698D70
    Dexter · seen
  • Arbitrum · exact
    $0.0100 (USDC)
    Recipient 0xAf8E0A8a8A0A8f65831b2dD0FFe0c1B804698D70
    Dexter · seen
  • eip155:1329 · exact
    $0.0100 (USDC)
    Recipient 0xAf8E0A8a8A0A8f65831b2dD0FFe0c1B804698D70
    Dexter · seen
GET https://api.kit-rx.com/v1/sec/events · 5 observations
Recent Form 8-K current reports (material corporate events) for a ticker or CIK over the last 1 to 365 days: filing date, event date, accession number, document URL and item numbers decoded to their Form 8-K titles (1.01 material agreement, 2.02 earnings results, 5.02 director or officer changes, 7.01 Reg FD, 8.01 other events and more), plus counts by item. Source: SEC EDGAR submissions API.

Kit Rx profile

  • Arbitrum · exact
    $0.0050 (USDC)
    Recipient 0xAf8E0A8a8A0A8f65831b2dD0FFe0c1B804698D70
    UltravioletaDAO · seen
  • Avalanche · exact
    $0.0050 (USDC)
    Recipient 0xAf8E0A8a8A0A8f65831b2dD0FFe0c1B804698D70
    UltravioletaDAO · seen
  • Polygon · exact
    $0.0050 (USDC)
    Recipient 0xAf8E0A8a8A0A8f65831b2dD0FFe0c1B804698D70
    UltravioletaDAO · seen
  • eip155:1329 · exact
    $0.0050 (USDC)
    Recipient 0xAf8E0A8a8A0A8f65831b2dD0FFe0c1B804698D70
    UltravioletaDAO · seen
  • Base · exact
    $0.0050 (USDC)
    Recipient 0xAf8E0A8a8A0A8f65831b2dD0FFe0c1B804698D70
    UltravioletaDAO · seen
GET https://api.kit-rx.com/v1/sec/filings · 10 observations
SEC EDGAR profile and latest filings for a ticker or CIK: company name, CIK, SIC code and industry, fiscal year end, state of incorporation, tickers and exchanges, plus the newest filings of selected forms (10-K, 10-Q, 8-K, 20-F, 6-K, S-1, DEF 14A, 4, 13F-HR, SC 13G) with filing and report dates, accession number, 8-K items and primary document URL. Optional latest XBRL revenue, net income, total assets and cash. Sources: SEC EDGAR submissions and XBRL APIs.

Kit Rx profile

  • Avalanche · exact
    $0.0100 (USDC)
    Recipient 0xAf8E0A8a8A0A8f65831b2dD0FFe0c1B804698D70
    UltravioletaDAO · seen
  • Polygon · exact
    $0.0100 (USDC)
    Recipient 0xAf8E0A8a8A0A8f65831b2dD0FFe0c1B804698D70
    UltravioletaDAO · seen
  • Arbitrum · exact
    $0.0100 (USDC)
    Recipient 0xAf8E0A8a8A0A8f65831b2dD0FFe0c1B804698D70
    UltravioletaDAO · seen
  • Base · exact
    $0.0100 (USDC)
    Recipient 0xAf8E0A8a8A0A8f65831b2dD0FFe0c1B804698D70
    UltravioletaDAO · seen
  • eip155:1329 · exact
    $0.0100 (USDC)
    Recipient 0xAf8E0A8a8A0A8f65831b2dD0FFe0c1B804698D70
    UltravioletaDAO · seen
  • Base · exact
    $0.0100 (USDC)
    Recipient 0xAf8E0A8a8A0A8f65831b2dD0FFe0c1B804698D70
    Dexter · seen
  • Avalanche · exact
    $0.0100 (USDC)
    Recipient 0xAf8E0A8a8A0A8f65831b2dD0FFe0c1B804698D70
    Dexter · seen
  • Arbitrum · exact
    $0.0100 (USDC)
    Recipient 0xAf8E0A8a8A0A8f65831b2dD0FFe0c1B804698D70
    Dexter · seen
  • Polygon · exact
    $0.0100 (USDC)
    Recipient 0xAf8E0A8a8A0A8f65831b2dD0FFe0c1B804698D70
    Dexter · seen
  • eip155:1329 · exact
    $0.0100 (USDC)
    Recipient 0xAf8E0A8a8A0A8f65831b2dD0FFe0c1B804698D70
    Dexter · seen
GET https://api.kit-rx.com/v1/sec/search · 5 observations
Full-text search of SEC EDGAR filings since 2001 (10-K, 10-Q, 8-K, proxy, S-1, exhibits and more): keywords, "exact phrase", OR, NOT, NEAR and trailing * wildcard, filtered by form type, ticker or CIK and filing date range. Returns total hits, hits by form, top filers and matching documents with company, CIK, ticker, form, filing date, period, accession number, 8-K items and sec.gov document URL. Insider Forms 3, 4, 5 and 144 excluded. Source: SEC EDGAR Full-Text Search.

Kit Rx profile

  • Arbitrum · exact
    $0.0050 (USDC)
    Recipient 0xAf8E0A8a8A0A8f65831b2dD0FFe0c1B804698D70
    UltravioletaDAO · seen
  • Base · exact
    $0.0050 (USDC)
    Recipient 0xAf8E0A8a8A0A8f65831b2dD0FFe0c1B804698D70
    UltravioletaDAO · seen
  • Polygon · exact
    $0.0050 (USDC)
    Recipient 0xAf8E0A8a8A0A8f65831b2dD0FFe0c1B804698D70
    UltravioletaDAO · seen
  • eip155:1329 · exact
    $0.0050 (USDC)
    Recipient 0xAf8E0A8a8A0A8f65831b2dD0FFe0c1B804698D70
    UltravioletaDAO · seen
  • Avalanche · exact
    $0.0050 (USDC)
    Recipient 0xAf8E0A8a8A0A8f65831b2dD0FFe0c1B804698D70
    UltravioletaDAO · seen
GET https://api.kit-rx.com/v1/web/check · 5 observations
Facts about a URL from a live fetch, never its body: final URL, status and chain after up to 5 validated redirects, response time, content type, server, security headers present/missing (HSTS, CSP, nosniff, framing, Referrer-Policy, Permissions-Policy), title, description, canonical, lang, Open Graph, robots meta, robots.txt rules for GPTBot, ClaudeBot, Google-Extended, CCBot, PerplexityBot, *, llms.txt, agent card, OpenAPI, x402 discovery, 402 terms. DNS via Cloudflare DoH.

Kit Rx profile

  • Arbitrum · exact
    $0.0050 (USDC)
    Recipient 0xAf8E0A8a8A0A8f65831b2dD0FFe0c1B804698D70
    UltravioletaDAO · seen
  • Polygon · exact
    $0.0050 (USDC)
    Recipient 0xAf8E0A8a8A0A8f65831b2dD0FFe0c1B804698D70
    UltravioletaDAO · seen
  • Avalanche · exact
    $0.0050 (USDC)
    Recipient 0xAf8E0A8a8A0A8f65831b2dD0FFe0c1B804698D70
    UltravioletaDAO · seen
  • eip155:1329 · exact
    $0.0050 (USDC)
    Recipient 0xAf8E0A8a8A0A8f65831b2dD0FFe0c1B804698D70
    UltravioletaDAO · seen
  • Base · exact
    $0.0050 (USDC)
    Recipient 0xAf8E0A8a8A0A8f65831b2dD0FFe0c1B804698D70
    UltravioletaDAO · seen
GET https://api.kit-rx.com/v1/web/headers · 5 observations
Grades a URL's HTTP security headers A+ to F (0-100) from one live fetch after up to 5 validated redirects. Per header: present, value, rating, points, issue, fix for HSTS, Content-Security-Policy (unsafe-inline, unsafe-eval, wildcards, frame-ancestors), X-Content-Type-Options, X-Frame-Options, Referrer-Policy, Permissions-Policy, COOP, COEP, CORP; Server/X-Powered-By version leaks; cookie Secure, HttpOnly, SameSite flags; missing list, summary. DNS via Cloudflare DoH.

Kit Rx profile

  • Polygon · exact
    $0.0050 (USDC)
    Recipient 0xAf8E0A8a8A0A8f65831b2dD0FFe0c1B804698D70
    UltravioletaDAO · seen
  • Arbitrum · exact
    $0.0050 (USDC)
    Recipient 0xAf8E0A8a8A0A8f65831b2dD0FFe0c1B804698D70
    UltravioletaDAO · seen
  • eip155:1329 · exact
    $0.0050 (USDC)
    Recipient 0xAf8E0A8a8A0A8f65831b2dD0FFe0c1B804698D70
    UltravioletaDAO · seen
  • Avalanche · exact
    $0.0050 (USDC)
    Recipient 0xAf8E0A8a8A0A8f65831b2dD0FFe0c1B804698D70
    UltravioletaDAO · seen
  • Base · exact
    $0.0050 (USDC)
    Recipient 0xAf8E0A8a8A0A8f65831b2dD0FFe0c1B804698D70
    UltravioletaDAO · seen
GET https://api.kit-rx.com/v1/web/markdown · 5 observations
Markdown of a live web page for LLM context: final URL after up to 5 validated redirects, HTTP status, content type, title, meta description, lang, Markdown (main content by default: <main>/<article>, without scripts, navigation, asides, footers), word count, token estimate, link count and truncation flag. PDF, DOCX, XLSX, OpenDocument, CSV and XML URLs are converted too; plain text is passed through. Conversion: Cloudflare Workers AI toMarkdown. DNS via Cloudflare DoH.

Kit Rx profile

  • Base · exact
    $0.0030 (USDC)
    Recipient 0xAf8E0A8a8A0A8f65831b2dD0FFe0c1B804698D70
    UltravioletaDAO · seen
  • eip155:1329 · exact
    $0.0030 (USDC)
    Recipient 0xAf8E0A8a8A0A8f65831b2dD0FFe0c1B804698D70
    UltravioletaDAO · seen
  • Polygon · exact
    $0.0030 (USDC)
    Recipient 0xAf8E0A8a8A0A8f65831b2dD0FFe0c1B804698D70
    UltravioletaDAO · seen
  • Avalanche · exact
    $0.0030 (USDC)
    Recipient 0xAf8E0A8a8A0A8f65831b2dD0FFe0c1B804698D70
    UltravioletaDAO · seen
  • Arbitrum · exact
    $0.0030 (USDC)
    Recipient 0xAf8E0A8a8A0A8f65831b2dD0FFe0c1B804698D70
    UltravioletaDAO · seen
GET https://api.kit-rx.com/v1/x402/find · 5 observations
Search and discovery of paid x402 API endpoints for a plain-language need, across Ultravioleta DAO x402 Bazaar and 402 Index directories. Dedupes by resource URL; ranks by relevance, verification, uptime, price and recency. Each result: resource URL, short description, USDC price, CAIP-2 networks, sources, verification. The top 3 GET endpoints get a live unpaid check: valid x402 402, live price, networks, canonical USDC, risk flags, OFAC SDN payTo screen, RDAP domain age.

Kit Rx profile

  • eip155:1329 · exact
    $0.0100 (USDC)
    Recipient 0xAf8E0A8a8A0A8f65831b2dD0FFe0c1B804698D70
    UltravioletaDAO · seen
  • Polygon · exact
    $0.0100 (USDC)
    Recipient 0xAf8E0A8a8A0A8f65831b2dD0FFe0c1B804698D70
    UltravioletaDAO · seen
  • Base · exact
    $0.0100 (USDC)
    Recipient 0xAf8E0A8a8A0A8f65831b2dD0FFe0c1B804698D70
    UltravioletaDAO · seen
  • Avalanche · exact
    $0.0100 (USDC)
    Recipient 0xAf8E0A8a8A0A8f65831b2dD0FFe0c1B804698D70
    UltravioletaDAO · seen
  • Arbitrum · exact
    $0.0100 (USDC)
    Recipient 0xAf8E0A8a8A0A8f65831b2dD0FFe0c1B804698D70
    UltravioletaDAO · seen
GET https://api.kit-rx.com/v1/x402/preflight · 5 observations
Sends an unpaid GET to an x402 endpoint and reports what it would charge before any payment: HTTP status and redirects (max 3, re-validated), x402 v2 PAYMENT-REQUIRED header or v1 body challenge and its validity, each accepts entry (scheme, CAIP-2 network and name, atomic amount, USD for canonical USDC, asset check, payTo, timeout, EIP-712 name/version), resource, Bazaar extension, risk flags, and host context from registry RDAP (registrar, domain age) and Cloudflare DoH.

Kit Rx profile

  • Base · exact
    $0.0050 (USDC)
    Recipient 0xAf8E0A8a8A0A8f65831b2dD0FFe0c1B804698D70
    UltravioletaDAO · seen
  • Avalanche · exact
    $0.0050 (USDC)
    Recipient 0xAf8E0A8a8A0A8f65831b2dD0FFe0c1B804698D70
    UltravioletaDAO · seen
  • Polygon · exact
    $0.0050 (USDC)
    Recipient 0xAf8E0A8a8A0A8f65831b2dD0FFe0c1B804698D70
    UltravioletaDAO · seen
  • eip155:1329 · exact
    $0.0050 (USDC)
    Recipient 0xAf8E0A8a8A0A8f65831b2dD0FFe0c1B804698D70
    UltravioletaDAO · seen
  • Arbitrum · exact
    $0.0050 (USDC)
    Recipient 0xAf8E0A8a8A0A8f65831b2dD0FFe0c1B804698D70
    UltravioletaDAO · seen
GET https://api.kit-rx.com/v1/x402/receipt · 15 observations
Decodes the x402 v2 PAYMENT-SIGNATURE header sent with the request into a readable receipt: x402 version, scheme, CAIP-2 network and chain name, resource URL, the copied payment requirements, payer, recipient, value in atomic units and USD, USDC contract, nonce, validity window in ISO-8601 with seconds to expiry, signature length and prefix, extension keys, and pass/fail diagnostics. Computed locally, no upstream source.

Kit Rx profile

  • Arbitrum · exact
    $0.0010 (USDC)
    Recipient 0xAf8E0A8a8A0A8f65831b2dD0FFe0c1B804698D70
    UltravioletaDAO · seen
  • eip155:1329 · exact
    $0.0010 (USDC)
    Recipient 0xAf8E0A8a8A0A8f65831b2dD0FFe0c1B804698D70
    UltravioletaDAO · seen
  • Base · exact
    $0.0010 (USDC)
    Recipient 0xAf8E0A8a8A0A8f65831b2dD0FFe0c1B804698D70
    UltravioletaDAO · seen
  • Polygon · exact
    $0.0010 (USDC)
    Recipient 0xAf8E0A8a8A0A8f65831b2dD0FFe0c1B804698D70
    UltravioletaDAO · seen
  • Avalanche · exact
    $0.0010 (USDC)
    Recipient 0xAf8E0A8a8A0A8f65831b2dD0FFe0c1B804698D70
    UltravioletaDAO · seen
  • Base · exact
    $0.0020 (USDC)
    Recipient 0xAf8E0A8a8A0A8f65831b2dD0FFe0c1B804698D70
    Dexter · seen
  • Arbitrum · exact
    $0.0020 (USDC)
    Recipient 0xAf8E0A8a8A0A8f65831b2dD0FFe0c1B804698D70
    Dexter · seen
  • eip155:1329 · exact
    $0.0020 (USDC)
    Recipient 0xAf8E0A8a8A0A8f65831b2dD0FFe0c1B804698D70
    Dexter · seen
  • Polygon · exact
    $0.0020 (USDC)
    Recipient 0xAf8E0A8a8A0A8f65831b2dD0FFe0c1B804698D70
    Dexter · seen
  • Avalanche · exact
    $0.0020 (USDC)
    Recipient 0xAf8E0A8a8A0A8f65831b2dD0FFe0c1B804698D70
    Dexter · seen
  • eip155:1329 · exact
    $0.0010 (USDC)
    Recipient 0xAf8E0A8a8A0A8f65831b2dD0FFe0c1B804698D70
    PayAI · seen
  • Arbitrum · exact
    $0.0010 (USDC)
    Recipient 0xAf8E0A8a8A0A8f65831b2dD0FFe0c1B804698D70
    PayAI · seen
  • Base · exact
    $0.0010 (USDC)
    Recipient 0xAf8E0A8a8A0A8f65831b2dD0FFe0c1B804698D70
    PayAI · seen
  • Polygon · exact
    $0.0010 (USDC)
    Recipient 0xAf8E0A8a8A0A8f65831b2dD0FFe0c1B804698D70
    PayAI · seen
  • Avalanche · exact
    $0.0010 (USDC)
    Recipient 0xAf8E0A8a8A0A8f65831b2dD0FFe0c1B804698D70
    PayAI · seen

Counts describe directory coverage, including testnets. Each resource groups the same URL, HTTP method or MCP tool across sources. A catalog sighting records published terms. A live 402 records the endpoint’s reply to an unpaid request.