ToolVet

Dev Reference

12 x402 APIs served from dev-reference.x402tookit.com

Every listing from Dev Reference that ToolVet tracks. Each one is called on a schedule without paying and scored out of 100.

At a glance

Listings
12 x402 APIs
Passing at the latest check
9 of 12
Uptime, 30 days
60.9% on average across 12 listings
Price
$0.02 per call
Trust score
33 to 63, median 60
Paying wallets, 30 days
No usage data
Verified owner
None
Security findings
None found
Listed since
20 Oct 2026

No usage data. The x402 Bazaar reports paying wallets for the x402 APIs it lists; MCP servers and APIs submitted directly have none.

All 12 listings

Ranked by trust score.

  • 63trust
    Http StatusDev Reference

    HTTP status code meaning, typical cause, client action and cacheability, from the IANA registry and RFC 9110.

    x402 APIDeveloper tools
    $0.02per call on Polygon
    70.6% uptime, 512 msPassing, checked 11 h ago
  • 63trust
    Dns Record TypeDev Reference

    DNS record type lookup by name (MX) or number (15): IANA meaning, RFC reference and typical use.

    x402 APIDeveloper tools
    $0.02per call on Polygon
    70.6% uptime, 530 msPassing, checked 10 h ago
  • 61trust
    Http Status ClassDev Reference

    All registered HTTP status codes in a class (1xx to 5xx) with names and one-line meanings.

    x402 APIOther
    $0.02per call on Polygon
    64.3% uptime, 523 msPassing, checked 5 h ago
  • 61trust
    Datetime ValidateDev Reference

    Validate an ISO 8601 or RFC 3339 date, time, timestamp, duration or interval, and say which standard it satisfies.

    x402 APIOther
    $0.02per call on Polygon
    64.3% uptime, 512 msPassing, checked 3 h ago
  • 60trust
    Unicode CharDev Reference

    Unicode character lookup by code point or character: name, block, category, UTF-8/UTF-16 bytes and HTML/JS/CSS escapes.

    x402 APIDeveloper tools
    $0.02per call on Polygon
    60.0% uptime, 532 msPassing, checked 4 h ago
  • 60trust
    Port LookupDev Reference

    IANA service name and common use for a TCP/UDP port (about 130 well-known ports), plus the port range class.

    x402 APIOther
    $0.02per call on Polygon
    60.0% uptime, 523 msPassing, checked 5 h ago
  • 60trust
    Mime TypeDev Reference

    Media type (MIME) for a file extension, or extensions for a media type, with IANA registration status.

    x402 APIDocuments & files
    $0.02per call on Polygon
    60.0% uptime, 522 msPassing, checked 3 h ago
  • 60trust
    Http HeaderDev Reference

    Explain an HTTP header: request or response, purpose, security notes, and its IANA registration status.

    x402 APISecurity & trust
    $0.02per call on Polygon
    60.0% uptime, 521 msPassing, checked 4 h ago
  • 60trust
    Cache Control ExplainDev Reference

    Parse a Cache-Control value, explain each directive, compute freshness and flag conflicts or leaks.

    x402 APISecurity & trust
    $0.02per call on Polygon
    60.0% uptime, 487 msPassing, checked 7 h ago
  • 33trust
    Http MethodDev Reference

    Whether an HTTP method is safe and idempotent (IANA registry), what it is for, and request-body semantics.

    x402 APIOther
    $0.02per call on Polygon
    53.9% uptime, 527 msFailing, checked 21 h ago
  • 33trust
    Datetime ConvertDev Reference

    Convert a timestamp (RFC 3339, ISO 8601, HTTP-date or epoch seconds) to RFC 3339, HTTP-date, RFC 5322, basic ISO and epoch.

    x402 APIDocuments & files
    $0.02per call on Polygon
    53.9% uptime, 507 msFailing, checked 21 h ago
  • 33trust
    Csp ExplainDev Reference

    Parse a Content-Security-Policy header value, explain each directive and flag risky settings like unsafe-inline.

    x402 APISecurity & trust
    $0.02per call on Polygon
    53.9% uptime, 529 msFailing, checked 22 h ago

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How these numbers are made

Each listing is called on a schedule without paying. Listings with usage or a verified owner are checked about every 30 minutes, others about every 6 hours. Uptime is the share of passing checks over 30 days, averaged across this provider's listings. Trust scores follow the published method. The figures on this page can be a few minutes behind the latest checks, and listings hidden after review aren't counted.