Route: validation

Say what you need in plain words. You get back the paid API that buyers actually pay for and that answers right now. It comes with the exact request to send and that seller's payment terms, read seconds ago, so you can pay with your first request. Free: no key, no account.

The answer

Email Validation API

Email Validation API: Email validation and email list cleaning. Checks each email address

GET https://api.kadec0.xyz/v1/email-validate · 0.03 USD · base

3 different buyers paid this exact route 122 times in the last 30 days (Coinbase CDP catalogue), last on 2026-10-21; answered a valid x402 402 to our check 1 s before this answer, in 318 ms

Payment terms (sign and send with the first request)

[
 {
  "scheme": "exact",
  "network": "eip155:8453",
  "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
  "amount": "30000",
  "payTo": "0x4df66B6c140778fe0717880A7c6dDE5Ea53AcDeA",
  "maxTimeoutSeconds": 300,
  "extra": {
   "name": "USD Coin",
   "version": "2"
  }
 }
]

census record · seller

Alternative 1

api.x402node.dev

Phone number validator: E.164 format check, international phone validation, country code p

GET https://api.x402node.dev/validate/phone · 0.0022 USD · base

7 different buyers paid this exact route 10 times in the last 30 days (Coinbase CDP catalogue), last on 2026-10-25; answered a valid x402 402 to our check 1 s before this answer, in 99 ms

Payment terms (sign and send with the first request)

[
 {
  "scheme": "exact",
  "network": "eip155:8453",
  "amount": "2200",
  "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
  "payTo": "0x4466d4A84b7c49a6A094ec6eef4a0712D6dd125e",
  "maxTimeoutSeconds": 300,
  "extra": {
   "name": "USD Coin",
   "version": "2"
  }
 },
 {
  "scheme": "exact",
  "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
  "amount": "2200",
  "asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
  "payTo": "9urRvUx69HqAopg1JGV9P9wR7JdKoztzdkuNyJ8Eo1up",
  "maxTimeoutSeconds": 300,
  "extra": {
   "feePayer": "CjNFTjvBhbJJd2B5ePPMHRLx1ELZpa8dwQgGL727eKww"
  }
 }
]

census record · seller

Alternative 2

x402endpoint-924155002144.us-west2.run.app

Current path for validation test

GET https://x402endpoint-924155002144.us-west2.run.app/validation · 0.01 USD · base

4 different buyers paid this exact route 4 times in the last 30 days (Coinbase CDP catalogue), last on 2026-10-23; answered a valid x402 402 to our check 1 s before this answer, in 244 ms

Payment terms (sign and send with the first request)

[
 {
  "scheme": "exact",
  "network": "eip155:8453",
  "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
  "amount": "10000",
  "payTo": "0xc3426919D3C3E822fdE601187ada28EF41c5f85d",
  "maxTimeoutSeconds": 300,
  "extra": {
   "name": "USD Coin",
   "version": "2"
  }
 },
 {
  "scheme": "exact",
  "network": "eip155:8453",
  "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
  "amount": "20000",
  "payTo": "0xc3426919D3C3E822fdE601187ada28EF41c5f85d",
  "maxTimeoutSeconds": 300,
  "extra": {
   "name": "USD Coin",
   "version": "2"
  }
 }
]

census record · seller

Alternative 3

agents.ai-rook.com

Email validation — syntax check plus live MX record DNS lookup to confirm deliverability.

POST https://agents.ai-rook.com/api/email-validate · 0.001 USD · base

2 different buyers paid this exact route 33 times in the last 30 days (Coinbase CDP catalogue), last on 2026-10-25; answered a valid 402 at the census probe (2026-10-22)

Payment terms (sign and send with the first request)

[
 {
  "scheme": "exact",
  "network": "eip155:8453",
  "amount": "1000",
  "payTo": "0xd5f96558FCb1f127c77C7d95EEa067F526d08618",
  "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
  "maxTimeoutSeconds": 300,
  "extra": {
   "name": "USD Coin",
   "version": "2"
  }
 }
]

census record · seller

Alternative 4

eu-verify

eu-verify: Offline validation of product barcode numbers: EAN-8, UPC-A, EAN-13 and GTIN-14

GET https://data.greeneris.io/v1/logistics/gtin-check · 0.001 USD · base

4 different buyers paid this exact route 5 times in the last 30 days (Coinbase CDP catalogue), last on 2026-10-25; answered a valid 402 at the census probe (2026-10-22)

Payment terms (sign and send with the first request)

[
 {
  "scheme": "exact",
  "network": "eip155:8453",
  "amount": "1000",
  "payTo": "0x6ab8efe305cce67daa48c97bde29c04402822dff",
  "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
  "maxTimeoutSeconds": 300,
  "extra": {
   "name": "USD Coin",
   "version": "2"
  }
 }
]

census record · seller

Only routes that answered a valid x402 402 at our census probe; the top three are checked again at answer time and one that answers goes first. Order: how well the route's own description matches your words, then distinct buyers of that exact route in 30 days and its calls (Coinbase CDP catalogue), paid in the last 7 days, input schema published, then lower price. Paid placement never changes this order; it shows only under sponsored.

Sponsored (paid placement, not ranked): Foundations Elements

For agents

GET https://bazaar.agentexchange.work/route.json?need=bitcoin%20price or POST https://bazaar.agentexchange.work/route {"need":"..."}, or the MCP tool route at https://bazaar.agentexchange.work/mcp. Optional filters: max_price_usd, network.

What buyers pay for most (30 days)

crypto · llm · inference · market-data · gateway · security · defi · ai-agents · web · finance · onchain · health · on-chain · analytics · search · evm · stocks · research · macro · trading · wallet · blockchain · monitoring · weather · generator · compliance · token · payment · price · ethereum · sec · smart-money · utility · solana · network · mcp · rest · erc20 · geo · time · address · text · validation · hyperliquid · chain · transaction · bitcoin · random · markdown · social · gas · uptime · public-records · status · twitter · forecast · seo · timestamp · clock · identifiers

All needs