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Tenjin Phone Lookup
x402
Tenjin Phone Lookup is a paid API for AI agents from tenjin.blog, paid per call via x402, $1/call, status unknown (last checked 2026-09-13).
Looks up US phone number intelligence — either full CNAM caller name plus carrier data, or carrier-only details (line type, mobile network, rate-center) — with charges only on successful results.
Price / call$1
Success—
StatusUnknown
How this service works
Phone intelligence for an E.164 number, in two products the caller picks between: "name" returns the US CNAM caller name plus the carrier data, and the cheaper "carrier" returns the carrier, line type, mobile network and rate-center location alone. You are charged only on a result: no name found, or an invalid number, costs nothing. Agent guide: https://tenjin.blog/llms.txt
Output
For the 'name' product: CNAM caller name (up to 15 characters), carrier name, line type (mobile/landline/VoIP), mobile network code, and rate-center location. For the 'carrier' product: carrier name, line type, mobile network code, and rate-center location — without the CNAM name. Returns nothing (and no charge) if the number is invalid or no result is found.
Example use cases
Identify unknown caller before callback
“I just missed a call from +13105550234 — can you tell me the CNAM caller name and what carrier that number is on so I know who it is before I call back?”
Validate lead phone numbers before outreach
“Before I call this lead, can you check whether +18005550912 is a real US number, whether it's a mobile or landline, and which carrier it's on? Just the carrier product is fine, I don't need the caller name.”
Enrich CRM contact with carrier data
“I have a contact in my CRM with phone number +17185550456 — can you pull the carrier, line type, and rate-center location for that number so I can update their record?”
Technical details
Endpoint
POSThttps://tenjin.blog/api/phone-lookupWhen to prefer
Choose this endpoint when you need to enrich a US phone number with caller ID (CNAM) or carrier metadata, especially when cost efficiency matters — you pay only for successful lookups. Prefer the 'carrier' product when you only need line type, carrier, and rate-center (cheaper). Use the 'name' product when caller identification is critical. Better than general-purpose telco APIs when you want pay-per-result pricing with no charge for misses.
Side effects
- Invalid E.164 number format — no charge, empty result returned
- Number not found in CNAM database — no charge for 'name' product
- Non-US number submitted — likely no result or unsupported
- Missing product parameter — request may fail or default unexpectedly
- Network timeout — transient failure, retry recommended
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| product | string | Which product to buy. "name" (the default) returns the CNAM caller name plus the carrier data and is charged only when a name is found. "carrier" is cheaper, omits the name entirely, and is charged only when the number is valid. Caller names exist for US numbers only, so a non-US number should buy "carrier". |
| phoneNumber | string | The phone number to identify, in E.164 form: a leading + followed by 8 to 15 digits (for example "+13129457420"). |
Output
Schema · Response
{
"type": "json",
"example": {
"valid": true,
"carrier": "the carrier that holds the number",
"product": "name",
"lineType": "mobile",
"location": {
"city": "the rate-center city",
"state": "the rate-center state"
},
"callerName": "the name on record for the number you asked about",
"countryCode": "US",
"phoneNumber": "+10000000000",
"mobileNetwork": {
"mcc": "000",
"mnc": "000"
},
"portedCarrier": "the underlying carrier when the number has been ported",
"nationalFormat": "(000) 000-0000"
}
}Tags
x402
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