Two ways to give your agent the 402 Index toolkit.
Install the MCP server
Direct programmatic discovery of every L402, x402, and MPP endpoint we index. Works in Claude Desktop, Claude Code, Cursor, Cline, Windsurf, Gemini CLI, and Codex.
sigtap - Crypto price API: BTC and ETH spot price from Coinbase with buy, sell and spread percenthttps://sigtap-outreach-api.sigtap.workers.dev/tools/crypto-price?from=test&to=test
x402
$0.0020
tools
healthy
6041ms
self-registered
sigtap - Crypto price API: BTC and ETH spot price from Coinbase with buy, sell and spread percenthttps://sigtap-outreach-api.sigtap.workers.dev/tools/crypto-price
x402
$0.0020
tools
healthy
6092ms
self-registered
sigtap - Domain Age Lookuphttps://sigtap-outreach-api.sigtap.workers.dev/tools/domain-age?domain=example.com
x402
$0.0030
tools
healthy
5386ms
self-registered
sigtap - Domain age checker: registration date, age in days and registrar via RDAP lookuphttps://sigtap-outreach-api.sigtap.workers.dev/tools/domain-age?domain=test
x402
$0.0030
tools
healthy
6075ms
self-registered
sigtap - Domain age checker: registration date, age in days and registrar via RDAP lookuphttps://sigtap-outreach-api.sigtap.workers.dev/tools/domain-age
x402
$0.0030
tools
healthy
6054ms
self-registered
sigtap - Email deliverability check: SPF, DKIM, DMARC and MX record audit for a sending domainhttps://sigtap-outreach-api.sigtap.workers.dev/deliverability
x402
$0.0030
email-marketing
healthy
6055ms
self-registered
sigtap - Email deliverability check: SPF, DKIM, DMARC and MX record audit for a sending domainhttps://sigtap-outreach-api.sigtap.workers.dev/deliverability?domain=test
x402
$0.0030
email-marketing
healthy
572ms
self-registered
sigtap - Hash a string: sha256, sha512, sha1, md5, CRC32, base64 checksum - crypto hash API for UTF-https://sigtap-outreach-api.sigtap.workers.dev/tools/hash
x402
$0.0005
tools
healthy
665ms
self-registered
sigtap - Hash a string: sha256, sha512, sha1, md5, CRC32, base64 checksum - crypto hash API for UTF-https://sigtap-outreach-api.sigtap.workers.dev/tools/hash?text=test
x402
$0.0005
tools
healthy
1312ms
self-registered
sigtap - JSON tools: flatten JSON to dot paths, or convert JSON rows to CSV onlinehttps://sigtap-outreach-api.sigtap.workers.dev/tools/json
x402
$0.0010
tools
healthy
6103ms
self-registered
sigtap - JSON tools: flatten JSON to dot paths, or convert JSON rows to CSV onlinehttps://sigtap-outreach-api.sigtap.workers.dev/tools/json?data=test
x402
$0.0010
tools
healthy
6084ms
self-registered
sigtap - JWT decoder: decode a JSON web token header and payload, with safety flags (never verifies https://sigtap-outreach-api.sigtap.workers.dev/tools/jwt-decode
x402
$0.0010
tools
healthy
997ms
self-registered
sigtap - JWT decoder: decode a JSON web token header and payload, with safety flags (never verifies https://sigtap-outreach-api.sigtap.workers.dev/tools/jwt-decode?token=test
x402
$0.0010
tools
healthy
299ms
self-registered
sigtap - Regex tester: test a regular expression - matches, groups, count and backtracking risk chechttps://sigtap-outreach-api.sigtap.workers.dev/tools/regex
x402
$0.0010
tools
healthy
863ms
self-registered
sigtap - Regex tester: test a regular expression - matches, groups, count and backtracking risk chechttps://sigtap-outreach-api.sigtap.workers.dev/tools/regex?pattern=test&text=test
x402
$0.0010
tools
healthy
779ms
self-registered
sigtap - Slug generator: url-safe slug from unicode text, latin and Cyrillic transliterationhttps://sigtap-outreach-api.sigtap.workers.dev/tools/slug
x402
$0.0010
tools
healthy
6082ms
self-registered
sigtap - Slug generator: url-safe slug from unicode text, latin and Cyrillic transliterationhttps://sigtap-outreach-api.sigtap.workers.dev/tools/slug?text=test
x402
$0.0010
tools
healthy
1326ms
self-registered
sigtap - UUID generator: batch unique ids - UUIDv4, UUIDv7, ULID or nanoid - random ID APIhttps://sigtap-outreach-api.sigtap.workers.dev/tools/uuid
x402
$0.0005
tools
healthy
1111ms
self-registered
sigtap - Weather API: current weather and next 3 hours temperature by lat, lon (open-meteo)https://sigtap-outreach-api.sigtap.workers.dev/tools/weather?lat=test&lon=test
x402
$0.0010
tools
healthy
6094ms
self-registered
supremeaihttps://agents.supremeai.ca/v1/validate
x402
$0.0020
data
healthy
832ms
self-registered
switch402 web search: a query in, up to 10 ranked results (title, URL, snippet) ...https://api.switch402.com/v1/search
toll402 – Working days in EU/EEA/Nordic countrieshttps://toll402.io/v1/calendar/working-days
x402
$0.01
calendar
healthy
357ms
self-registered
true402 DeFi Yields — best APY across lending & staking pools — via FiatDock Marketplacehttps://fiatdock.com/s/svc_b5dd18c2-c82a-4f67-b287-b90598a670a5
x402
$0.0050
finance
healthy
71ms
self-registered
true402 Deployer Check — who created the token: fresh throwaway or established wallet — via FiatDock Marketplacehttps://fiatdock.com/s/svc_fc424a1d-8f50-42dc-8d65-d99ce85bee46
true402 Link Preview — Open Graph / unfurl metadata for any URL — via FiatDock Marketplacehttps://fiatdock.com/s/svc_f8d26c50-b1ed-49b5-b962-7bfcb6eb11f4
x402
$0.0030
web
healthy
76ms
self-registered
true402 Liquidity Pulls — rug pull alerts on Base — via FiatDock Marketplacehttps://fiatdock.com/s/svc_fbe25ea2-04b2-4983-ac92-891a4bb68479
true402 Quant Calculators — Black-Scholes, implied volatility, Kelly, Sharpe, VaR — via FiatDock Marketplacehttps://fiatdock.com/s/svc_64d3be32-5ced-4d2d-89fb-02132b0088dd
x402
$0.0030
finance
healthy
120ms
self-registered
true402 Robots Check — robots.txt & llms.txt: which AI crawlers are allowed — via FiatDock Marketplacehttps://fiatdock.com/s/svc_5c3f119b-73f0-4ef0-b456-ddd188c2e701
x402
$0.0030
web
healthy
106ms
self-registered
true402 Rug Check Dossier — full pre-trade due diligence (deployer, liquidity, verdict) — via FiatDock Marketplacehttps://fiatdock.com/s/svc_eddced45-d48d-4857-a853-571760dde719
true402 Transaction Simulation — preflight a transaction before you sign (revert, approvals) — via FiatDock Marketplacehttps://fiatdock.com/s/svc_b459b285-77ee-4882-88c4-b08f4a401b91
true402 Wallet Risk — reported scams & theft, contract risk, before you send or approve — via FiatDock Marketplacehttps://fiatdock.com/s/svc_78c2e7d0-a1a6-4617-a45b-c0ab017037bc