Courser Email Verification
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SearchLiveeip155:8453Exactvia cdp
EmailEmail-verificationDeliverabilityMx-lookupDisposable-detection
Calls · 30d
4→ 0%
This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 20 snapshots so far.
$0.25
Verified settled volume
24 settlements proven x402 by their on-chain EIP-3009 marker.
$0.020
Listed price
As published in the catalog. Always read the live 402 before paying.
4
Calls · 30d
Upstream's own call count for this endpoint, not ours.
1
Unique payers · 30d
Last called 2026-08-30 01:04Z
—
Upstream on-chain volume
Reported by the source catalog.
Paid to
0xfd690be940b7115d4fdd2fa2df8b2dc0d1a396b9The 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": "X-PAYMENT header required",
"accepts": [
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0xfd690be940b7115d4fdd2fa2df8b2dc0d1a396b9",
"scheme": "exact",
"network": "base",
"mimeType": "application/json",
"resource": "https://tizona-outpost.venusberg.workers.dev/v1/verify-email",
"description": "Payment required — POST the documented JSON body to use this endpoint.",
"maxAmountRequired": "20000",
"maxTimeoutSeconds": 60
}
],
"x402Version": 1
}Accepts
The payment requirements as published to the catalog. Read the live 402 before paying — a price here is a claim, not a quote.
0.02USDC≈ $0.02 USD
on Base · exact scheme
Pay 0.02 USDC on Base to 0xfd69…396b9. The signed payment is good for 1 minute.
- Paid to
- 0xfd69…396b9
- USD Coin contract
- 0x8335…02913
- Payment window
- 1 minute
- As published
- 20000 smallest units
- Buys
- Email verification — syntax, live MX, disposable, role mailbox, typo. No mail is sent.
- Returns
- application/json
The catalog’s raw entry
[
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0xfd690be940b7115d4fdd2fa2df8b2dc0d1a396b9",
"amount": "20000",
"scheme": "exact",
"network": "eip155:8453",
"mimeType": "application/json",
"resource": "https://tizona-outpost.venusberg.workers.dev/v1/verify-email",
"extensions": {
"bazaar": {
"info": {
"input": {
"body": {
"email": "name@example.com"
},
"type": "http",
"method": "POST",
"bodyType": "json"
},
"output": {
"type": "json",
"example": {
"risk": "low",
"email": "name@example.com",
"score": 100,
"valid": true,
"checks": {
"mx": {
"found": true,
"provider": "Google Workspace"
},
"role": null,
"disposable": false,
"freeProvider": null,
"typoSuggestion": null
},
"factors": [
{
"detail": "MX present — Google Workspace",
"effect": 0,
"signal": "mx"
}
],
"assessment": "deliverable",
"provenance": {
"checks": {
"mx": {
"via": "DNS-over-HTTPS",
"query": "https://…&type=MX"
}
},
"engine": "courser",
"verdictHash": "<sha-256>",
"reproducible": true
}
}
}
},
"schema": {
"type": "object",
"$schema": "https://json-schema.org/draft/2020-12/schema",
"required": [
"input"
],
"properties": {
"input": {
"type": "object",
"required": [
"type",
"method",
"bodyType",
"body"
],
"properties": {
"body": {
"type": "object",
"properties": {
"email": {
"type": "string"
}
}
},
"type": {
"type": "string",
"const": "http"
},
"method": {
"enum": [
"POST",
"PUT",
"PATCH"
],
"type": "string"
},
"bodyType": {
"enum": [
"json",
"form-data",
"text"
],
"type": "string"
}
},
"additionalProperties": false
},
"output": {
"type": "object",
"required": [
"type"
],
"properties": {
"type": {
"type": "string"
},
"example": {
"type": "object",
"properties": {
"risk": {
"type": "string"
},
"email": {
"type": "string"
},
"score": {
"type": "integer"
},
"valid": {
"type": "boolean"
},
"checks": {
"type": "object",
"properties": {
"mx": {
"type": "object",
"properties": {
"found": {
"type": "boolean"
},
"provider": {
"type": "string"
}
}
},
"role": {
"type": [
"object",
"null"
]
},
"disposable": {
"type": "boolean"
},
"freeProvider": {
"type": [
"object",
"null"
]
},
"typoSuggestion": {
"type": [
"object",
"null"
]
}
}
},
"factors": {
"type": "array",
"items": {
"type": "object",
"properties": {
"detail": {
"type": "string"
},
"effect": {
"type": "integer"
},
"signal": {
"type": "string"
}
}
}
},
"assessment": {
"type": "string"
},
"provenance": {
"type": "object",
"properties": {
"checks": {
"type": "object",
"properties": {
"mx": {
"type": "object",
"properties": {
"via": {
"type": "string"
},
"query": {
"type": "string"
}
}
}
}
},
"engine": {
"type": "string"
},
"verdictHash": {
"type": "string"
},
"reproducible": {
"type": "boolean"
}
}
}
}
}
}
}
}
}
}
},
"description": "Email verification — syntax, live MX, disposable, role mailbox, typo. No mail is sent.",
"maxTimeoutSeconds": 60
}
]Extensions
{
"bazaar": {
"info": {
"input": {
"body": {
"email": "name@example.com"
},
"type": "http",
"method": "POST",
"bodyType": "json"
},
"output": {
"type": "json",
"example": {
"risk": "low",
"email": "name@example.com",
"score": 100,
"valid": true,
"checks": {
"mx": {
"found": true,
"provider": "Google Workspace"
},
"role": null,
"disposable": false,
"freeProvider": null,
"typoSuggestion": null
},
"factors": [
{
"detail": "MX present — Google Workspace",
"effect": 0,
"signal": "mx"
}
],
"assessment": "deliverable",
"provenance": {
"checks": {
"mx": {
"via": "DNS-over-HTTPS",
"query": "https://…&type=MX"
}
},
"engine": "courser",
"verdictHash": "<sha-256>",
"reproducible": true
}
}
}
},
"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",
"properties": {
"email": {
"type": "string"
}
}
},
"type": {
"type": "string",
"const": "http"
},
"method": {
"enum": [
"POST",
"PUT",
"PATCH"
],
"type": "string"
},
"bodyType": {
"enum": [
"json",
"form-data",
"text"
],
"type": "string"
}
},
"additionalProperties": false
},
"output": {
"type": "object",
"required": [
"type"
],
"properties": {
"type": {
"type": "string"
},
"example": {
"type": "object",
"properties": {
"risk": {
"type": "string"
},
"email": {
"type": "string"
},
"score": {
"type": "integer"
},
"valid": {
"type": "boolean"
},
"checks": {
"type": "object",
"properties": {
"mx": {
"type": "object",
"properties": {
"found": {
"type": "boolean"
},
"provider": {
"type": "string"
}
}
},
"role": {
"type": [
"object",
"null"
]
},
"disposable": {
"type": "boolean"
},
"freeProvider": {
"type": [
"object",
"null"
]
},
"typoSuggestion": {
"type": [
"object",
"null"
]
}
}
},
"factors": {
"type": "array",
"items": {
"type": "object",
"properties": {
"detail": {
"type": "string"
},
"effect": {
"type": "integer"
},
"signal": {
"type": "string"
}
}
}
},
"assessment": {
"type": "string"
},
"provenance": {
"type": "object",
"properties": {
"checks": {
"type": "object",
"properties": {
"mx": {
"type": "object",
"properties": {
"via": {
"type": "string"
},
"query": {
"type": "string"
}
}
}
}
},
"engine": {
"type": "string"
},
"verdictHash": {
"type": "string"
},
"reproducible": {
"type": "boolean"
}
}
}
}
}
}
}
}
}
}
}Provenance
- Seen in the source catalog
- 2026-08-30 01:04Z
- Last indexed by Roundhouse
- 2026-09-16 19:00Z
- Last enriched (probe, favicon, geo)
- 2026-09-21 02:45Z
- x402 version
- 2
- Max timeout
- 60s
- Liveness probe
- HTTP 404
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. 20 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 Courser Email Verification 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=Courser%20Email%20Verification' 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://tizona-outpost.venusberg.workers.dev/v1/verify-email, 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.