Phone Number Validation
Professor Sausages
SocialLiveeip155:8453Exactvia cdp
PhoneValidationE164VerificationTrust
Settlements · 30d
116↑ 523%
No per-endpoint history for this service yet, so this is payments indexed to its PROVIDER's wallet over 30 days.
$4.28
Verified settled volume
326 settlements proven x402 by their on-chain EIP-3009 marker.
$0.0020
Listed price
As published in the catalog. Always read the live 402 before paying.
2
Calls · 30d
Upstream's own call count for this endpoint, not ours.
1
Unique payers · 30d
Last called 2026-07-21 01:58Z
—
Upstream on-chain volume
Reported by the source catalog.
Paid to
0x54ebFCF3870439B9db62381848c5DabC05c70d5BThe wallet the 402 directs payment to. Its whole payment record — every payer, every chain — is on the merchant page.
Asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913
Provider
The payTo wallet does not resolve to a registered ERC-8004 agent. That is not a verdict on the service — most of the catalog is unregistered.
Live 402 challenge
Captured by the enrichment pass, not read just now. Prices can change — always read the 402 the endpoint answers with.
{
"error": "payment required",
"accepts": [
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0x54ebFCF3870439B9db62381848c5DabC05c70d5B",
"amount": "2000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 60
}
],
"resource": {
"url": "https://x402.professorsausages.com/phone-check/check",
"tags": [
"phone",
"validation",
"e164",
"verification",
"trust"
],
"mimeType": "application/json",
"description": "Validate & normalize one phone number — E.164, line type, region, verdict (pure CPU, zero upstream)",
"serviceName": "Phone Number Validation"
},
"extensions": {
"bazaar": {
"info": {
"input": {
"type": "http",
"method": "GET",
"queryParams": {
"number": "The phone number, raw. May contain spaces/dashes/parens. If it starts with + the region is optional.",
"region": "ISO 3166-1 alpha-2 region (e.g. US, GB). Required for national-format numbers without a leading +."
}
},
"output": {
"type": "object",
"required": [
"method",
"input",
"region_used",
"valid",
"possible",
"type",
"verdict",
"evidence",
"not_checked",
"disclaimer"
],
"properties": {
"e164": {
"type": [
"string",
"null"
],
"description": "E.164 normalized form (e.g. +14155552671)."
},
"type": {
"enum": [
"mobile",
"fixed_line",
"fixed_line_or_mobile",
"toll_free",
"premium_rate",
"shared_cost",
"voip",
"personal_number",
"pager",
"uan",
"voicemail",
"unknown"
],
"type": "string"
},
"input": {
"type": "string"
},
"valid": {
"type": "boolean"
},
"method": {
"type": "string",
"description": "libphonenumber-js/max <version>."
},
"region": {
"type": [
"string",
"null"
],
"description": "Parsed ISO 3166-1 alpha-2 region."
},
"rfc3966": {
"type": [
"string",
"null"
],
"description": "RFC 3966 tel: URI."
},
"verdict": {
"enum": [
"VALID",
"POSSIBLE_BUT_INVALID",
"INVALID"
],
"type": "string",
"description": "VALID = assigned range; POSSIBLE_BUT_INVALID = plausible length, no range; INVALID = not possible."
},
"evidence": {
"type": "array",
"items": {
"type": "string"
}
},
"national": {
"type": [
"string",
"null"
]
},
"possible": {
"type": "boolean"
},
"disclaimer": {
"type": "string"
},
"not_checked": {
"type": "array",
"items": {
"type": "string"
},
"description": "carrier_lookup, line_activity_hlr, ported_status, spam_reputation — need paid telco APIs."
},
"region_used": {
"type": [
"string",
"null"
]
},
"country_code": {
"type": [
"string",
"null"
],
"description": "Country calling code, e.g. \"1\" or \"44\"."
},
"length_valid": {
"type": "boolean"
},
"international": {
"type": [
"string",
"null"
]
},
"example_number_for_region": {
"type": [
"string",
"null"
]
}
}
}
},
"schema": {
"type": "object",
"required": [
"input"
],
"properties": {
"input": {
"type": "object"
},
"output": {
"type": "object"
}
}
},
"category": "verification",
"routeTemplate": "https://x402.professorsausages.com/phone-check/check"
},
"sample": {
"url": "https://x402.professorsausages.com/phone-check/sample",
"hint": "A real cached response from this API (with its capture timestamp), free — judge the data quality before paying."
},
"catalog": {
"message": "This endpoint is 1 of 29 pay-per-call APIs for agents — all same x402 payment + auth. Browse the full menu free (no payment) at the catalog URL; every API serves a free real sample record at /<api>/sample.",
"strategy": "minimal",
"catalogUrl": "https://x402.professorsausages.com/?ref=402&v=minimal&from=phone-check"
},
"suggest": {
"url": "https://x402.professorsausages.com/suggest",
"hint": "Missing data you'd pay for? POST {want, would_pay_usd} — free. The most-requested datasets get built first."
},
"discount": {
"off": "50%",
"hint": "Send X-Intent: <40+ chars describing what you're building and what data you need> for 50% off this call.",
"header": "X-Intent"
}
},
"x402Version": 2
}Accepts
The payment requirements as published to the catalog. Read the live 402 before paying — a price here is a claim, not a quote.
0.002USDC≈ $0.002 USD
on Base · exact scheme
Pay 0.002 USDC on Base to 0x54eb…70d5B. The signed payment is good for 1 minute.
- Paid to
- 0x54eb…70d5B
- USD Coin contract
- 0x8335…02913
- Payment window
- 1 minute
- As published
- 2000 smallest units
The catalog’s raw entry
[
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0x54ebFCF3870439B9db62381848c5DabC05c70d5B",
"amount": "2000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 60
}
]Extensions
{
"bazaar": {
"info": {
"input": {
"type": "http",
"method": "GET",
"queryParams": {
"number": "The phone number, raw. May contain spaces/dashes/parens. If it starts with + the region is optional.",
"region": "ISO 3166-1 alpha-2 region (e.g. US, GB). Required for national-format numbers without a leading +."
}
},
"output": {
"type": "object",
"required": [
"method",
"input",
"region_used",
"valid",
"possible",
"type",
"verdict",
"evidence",
"not_checked",
"disclaimer"
],
"properties": {
"e164": {
"type": [
"string",
"null"
],
"description": "E.164 normalized form (e.g. +14155552671)."
},
"type": {
"enum": [
"mobile",
"fixed_line",
"fixed_line_or_mobile",
"toll_free",
"premium_rate",
"shared_cost",
"voip",
"personal_number",
"pager",
"uan",
"voicemail",
"unknown"
],
"type": "string"
},
"input": {
"type": "string"
},
"valid": {
"type": "boolean"
},
"method": {
"type": "string",
"description": "libphonenumber-js/max <version>."
},
"region": {
"type": [
"string",
"null"
],
"description": "Parsed ISO 3166-1 alpha-2 region."
},
"rfc3966": {
"type": [
"string",
"null"
],
"description": "RFC 3966 tel: URI."
},
"verdict": {
"enum": [
"VALID",
"POSSIBLE_BUT_INVALID",
"INVALID"
],
"type": "string",
"description": "VALID = assigned range; POSSIBLE_BUT_INVALID = plausible length, no range; INVALID = not possible."
},
"evidence": {
"type": "array",
"items": {
"type": "string"
}
},
"national": {
"type": [
"string",
"null"
]
},
"possible": {
"type": "boolean"
},
"disclaimer": {
"type": "string"
},
"not_checked": {
"type": "array",
"items": {
"type": "string"
},
"description": "carrier_lookup, line_activity_hlr, ported_status, spam_reputation — need paid telco APIs."
},
"region_used": {
"type": [
"string",
"null"
]
},
"country_code": {
"type": [
"string",
"null"
],
"description": "Country calling code, e.g. \"1\" or \"44\"."
},
"length_valid": {
"type": "boolean"
},
"international": {
"type": [
"string",
"null"
]
},
"example_number_for_region": {
"type": [
"string",
"null"
]
}
}
}
},
"schema": {
"type": "object",
"required": [
"input"
],
"properties": {
"input": {
"type": "object"
},
"output": {
"type": "object"
}
}
},
"category": "verification",
"routeTemplate": "https://x402.professorsausages.com/phone-check/check"
},
"sample": {
"url": "https://x402.professorsausages.com/phone-check/sample",
"hint": "A real cached response from this API (with its capture timestamp), free — judge the data quality before paying."
},
"catalog": {
"message": "You called Phone Number Validation. Agents doing verification work commonly also use these — same pay-per-call model, each with a FREE real sample record (freeSample link):",
"related": [
{
"call": "/email-check?ref=xsell&v=related&from=phone-check",
"name": "Email Deliverability Check",
"summary": "Part of the Trust & Verification suite — verify anything, pay-per-check",
"freeSample": "/email-check/sample?ref=xsell&v=related&from=phone-check"
},
{
"call": "/domain-intel?ref=xsell&v=related&from=phone-check",
"name": "Domain Intel (RDAP + DNS)",
"summary": "Domain registration truth + DNS posture for agents, pay-per-check — part of the Trust & Verification suite…",
"freeSample": "/domain-intel/sample?ref=xsell&v=related&from=phone-check"
},
{
"call": "/url-screen?ref=xsell&v=related&from=phone-check",
"name": "Malicious URL Screen",
"summary": "Phishing & malicious-URL screening for agents — hand over any http(s) URL and get a structured risk verdict…",
"freeSample": "/url-screen/sample?ref=xsell&v=related&from=phone-check"
}
],
"strategy": "related",
"catalogUrl": "https://x402.professorsausages.com/?ref=402&v=related&from=phone-check"
},
"suggest": {
"url": "https://x402.professorsausages.com/suggest",
"hint": "Missing data you'd pay for? POST {want, would_pay_usd} — free. The most-requested datasets get built first."
},
"discount": {
"off": "50%",
"hint": "Send X-Intent: <40+ chars describing what you're building and what data you need> for 50% off this call.",
"header": "X-Intent"
}
}Provenance
- Seen in the source catalog
- 2026-07-21 01:58Z
- Last indexed by Roundhouse
- 2026-07-23 06:10Z
- Last enriched (probe, favicon, geo)
- 2026-09-10 11:45Z
- x402 version
- 2
- Max timeout
- 60s
- Liveness probe
- HTTP 400
Hand this page to an agent
Copy the prompt and paste it into Claude, an MCP client or your own agent — it will vet this service and call it over the free read API. No key, no account.
GET api.roundhouseai.io/v0/endpoints
No per-endpoint history for this service yet, so this is payments indexed to its PROVIDER's wallet over 30 days. Verified volume counts only settlements with an on-chain EIP-3009 marker.
Show the promptHide the prompt
Using Roundhouse, look up the x402 service Phone Number Validation and tell me whether it is worth paying: what a call costs, whether the endpoint answered when last probed, and what its payment record actually shows. curl -s 'https://api.roundhouseai.io/v0/endpoints?q=Phone%20Number%20Validation' curl -s 'https://api.roundhouseai.io/v0/merchants/<the payTo wallet returned above>' Then call it: read the price from the live 402 at https://x402.professorsausages.com/phone-check/check, never from a cached figure, and pay with an x402 client. The /v0 API needs an API key (`authorization: Bearer rh_live_…`) on everything except /v0/unified* and /v0/endpoints. Mint a personal key for $0.01 at GET https://api.roundhouseai.io/v0/test/x402, or use an organization key from https://roundhouseai.io/dashboard/team. If you do not have Roundhouse tools or skills installed, read https://roundhouseai.io/skill.md first — it is the whole procedure.