Tenjin
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
The wallet the 402 directs payment to. Its whole payment record — every payer, every chain — is on the merchant page.
Asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913
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.
Accepts
The payment requirements as published to the catalog. Read the live 402 before paying — a price here is a claim, not a quote.
Pay 1 USDC on Base to 0x578c…41063. The signed payment is good for 5 minutes.
- Paid to
- 0x578c…41063
- USD Coin contract
- 0x8335…02913
- Payment window
- 5 minutes
- As published
- 1000000 smallest units
The catalog’s raw entry
[
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0x578c640E2D53023066026381B8CC362539741063",
"amount": "1000000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 300
}
]Extensions
{
"bazaar": {
"info": {
"input": {
"body": {
"product": "name",
"phoneNumber": "+13129457420"
},
"type": "http",
"method": "POST",
"bodyType": "json"
},
"output": {
"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"
}
}
},
"schema": {
"type": "object",
"$schema": "https://json-schema.org/draft/2020-12/schema",
"required": [
"input"
],
"properties": {
"input": {
"type": "object",
"required": [
"type",
"method",
"bodyType",
"body"
],
"properties": {
"body": {
"type": "object",
"required": [
"phoneNumber"
],
"properties": {
"product": {
"enum": [
"name",
"carrier"
],
"type": "string",
"default": "name",
"description": "Which product to buy. \"name\" (the default) returns the CNAM caller name plus the carrier data and is charged only when a name is found. \"carrier\" is cheaper, omits the name entirely, and is charged only when the number is valid. Caller names exist for US numbers only, so a non-US number should buy \"carrier\"."
},
"phoneNumber": {
"type": "string",
"pattern": "^\\+[1-9][0-9]{7,14}$",
"description": "The phone number to identify, in E.164 form: a leading + followed by 8 to 15 digits (for example \"+13129457420\")."
}
},
"additionalProperties": false
},
"type": {
"type": "string",
"const": "http"
},
"method": {
"enum": [
"POST"
],
"type": "string"
},
"bodyType": {
"enum": [
"json",
"form-data",
"text"
],
"type": "string"
}
},
"additionalProperties": false
},
"output": {
"type": "object",
"required": [
"type"
],
"properties": {
"type": {
"type": "string"
},
"example": {
"type": "object"
}
}
}
}
}
},
"builder-code": {
"info": {
"a": "bc_kc0altv3"
},
"schema": {
"type": "object",
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"a": {
"type": "string",
"pattern": "^[a-z0-9_]{1,32}$",
"description": "App builder code"
},
"s": {
"type": "array",
"items": {
"type": "string",
"pattern": "^[a-z0-9_]{1,32}$"
},
"description": "Service builder codes"
},
"w": {
"type": "string",
"pattern": "^[a-z0-9_]{1,32}$",
"description": "Wallet builder code"
}
},
"additionalProperties": false
}
}
}Provenance
- Seen in the source catalog
- 2026-08-17 22:27Z
- Last indexed by Roundhouse
- 2026-09-16 22:30Z
- Last enriched (probe, favicon, geo)
- 2026-09-23 22:15Z
- x402 version
- 2
- Max timeout
- 300s
- Liveness probe
- HTTP 405
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
This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 24 snapshots so far. Verified volume counts only settlements with an on-chain EIP-3009 marker.
Show the promptHide the prompt
Using Roundhouse, look up the x402 service Tenjin 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=Tenjin' 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://tenjin.blog/api/phone-lookup, 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.