HubVibe
Email verification / email validation: will mail to this address arrive? Checked live at the source: syntax, the domain's DNS (MX, null MX, no such domain) and its own mail server, asked whether the mailbox exists and whether it accepts any address (catch-all). No message sent. Flags disposable domains, role accounts (info@), free providers and typos (gmial.com). Verdict: deliverable, undeliverable, risky or unknown, with the reason. Input: email.
SocialLiveeip155:8453Exactvia cdp
Email-verificationEmail-validationDeliverabilityDisposable-emailLead-validation
Calls · 30d
5↑ 81%
This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 29 snapshots so far.
$354.60
Verified settled volume
878 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.
5
Calls · 30d
Upstream's own call count for this endpoint, not ours.
3
Unique payers · 30d
Last called 2026-10-19 06:35Z
—
Upstream on-chain volume
Reported by the source catalog.
Paid to
0x837C40E2B4e976f43Ffb4451eE281A00fA9477ddThe 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.
{
"docs": "https://hubvibe-io.com/.well-known/agent.json",
"error": "payment_required",
"price": "$0.02",
"accepts": [
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0x837C40E2B4e976f43Ffb4451eE281A00fA9477dd",
"scheme": "exact",
"network": "base",
"mimeType": "application/json",
"resource": "https://hubvibe-io.com/work/email/verify",
"description": "Email verification / email validation: will mail to this address arrive? Checked live at the source: syntax, the domain's DNS (MX, null MX, no such domain) and its own mail server, asked whether the mailbox exists and whether it accepts any address (catch-all). No message sent. Flags disposable domains, role accounts (info@), free providers and typos (gmial.com). Verdict: deliverable, undeliverable, risky or unknown, with the reason. Input: email.",
"maxAmountRequired": "20000",
"maxTimeoutSeconds": 300
}
],
"contract": {
"url": "https://hubvibe-io.com/contracts/email.verify",
"hash": "sha256:df6a8708b83d10927431df5d997eaf367a6f48a1e16972eca7694161eb97fab0",
"header": "X-HubVibe-Contract",
"verify": "https://hubvibe-io.com/contracts/email.verify/verify"
},
"price_usd": 0.02,
"extensions": {
"bazaar": {
"info": {
"input": {
"body": {
"email": "support@github.com"
},
"type": "http",
"method": "POST",
"bodyType": "json"
},
"output": {
"type": "json",
"example": {
"result": {
"mx": [],
"email": "support@github.com",
"notes": [],
"domain": "github.com",
"reason": "mailbox_exists",
"mailbox": {
"exists": true,
"checked": true,
"mx_host": "aspmx.l.google.com",
"catch_all": false,
"smtp_code": 250,
"smtp_message": "2.1.5 OK"
},
"verdict": "deliverable",
"checked_at": "2026-09-26T18:00:00Z",
"disposable": false,
"local_part": "support",
"normalized": "support@github.com",
"accepts_mail": true,
"did_you_mean": "jane@gmail.com",
"domain_ascii": "github.com",
"role_account": true,
"syntax_valid": true,
"domain_exists": true,
"free_provider": false,
"mail_provider": "google",
"disposable_list_as_of": "2026-09-28"
},
"status": "ok",
"worker": "email.verify",
"price_usd": 0.02,
"provenance": {
"steps": [
{
"ms": 312,
"ok": true,
"step": "quote",
"reason": "provider_timeout",
"provider": "coinbase-advanced-trade-public"
}
],
"attempts": 1,
"elapsed_ms": 340,
"providers_used": [
"coinbase-advanced-trade-public"
]
},
"receipt_id": "rcpt_9f1c2b3a4d5e6f70",
"attribution": [
{
"url": "https://translate.google.com",
"text": "Translated by Google"
}
],
"receipt_url": "/work/receipts/rcpt_9f1c2b3a4d5e6f70"
}
}
},
"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": [
"email"
],
"properties": {
"email": {
"type": "string",
"maxLength": 320,
"minLength": 3,
"description": "One email address, such as jane@example.com."
},
"language": {
"type": "string",
"pattern": "^[A-Za-z]{2,3}(-[A-Za-z0-9]{2,8})*$",
"maxLength": 35,
"description": "Optional BCP-47 language tag (en, ja, ko, pt-BR): the human-readable strings of the result (notes, details, reasons) are translated into this language; data, codes, numbers and URLs are untouched. Default: as produced."
}
},
"additionalProperties": false
},
"type": {
"type": "string",
"const": "http"
},
"method": {
"enum": [
"POST",
"PUT",
"PATCH"
],
"type": "string"
},
"bodyType": {
"enum": [
"json",
"form-data",
"text"
],
"type": "string"
}
},
"additionalProperties": false
},
"output": {
"type": "object",
"required": [
"type"
],
"properties": {
"type": {
"type": "string"
},
"example": {
"type": "object",
"title": "email.verify response",
"$schema": "https://json-schema.org/draft/2020-12/schema",
"required": [
"status",
"worker",
"price_usd",
"result",
"provenance",
"receipt_id",
"receipt_url"
],
"properties": {
"result": {
"type": "object",
"required": [
"email",
"normalized",
"local_part",
"domain",
"domain_ascii",
"verdict",
"reason",
"syntax_valid",
"domain_exists",
"accepts_mail",
"mx",
"mail_provider",
"mailbox",
"disposable",
"role_account",
"free_provider",
"did_you_mean",
"disposable_list_as_of",
"notes",
"checked_at"
],
"properties": {
"mx": {
"type": "array",
"items": {
"type": "object",
"required": [
"host",
"priority"
],
"properties": {
"host": {
"type": "string",
"examples": [
"aspmx.l.google.com"
],
"description": "Mail server host."
},
"priority": {
"type": "integer",
"examples": [
1
],
"description": "MX preference (lower is tried first)."
}
},
"description": "One mail server."
},
"examples": [
[]
],
"description": "The domain's mail servers, in the order mail tries them."
},
"email": {
"type": "string",
"examples": [
"support@github.com"
],
"description": "The address as given."
},
"notes": {
"type": "array",
"items": {
"type": "string",
"examples": [
"Role address: it usually reaches a team or a shared inbox, not one person."
],
"description": "A caveat."
},
"examples": [
[]
],
"description": "Caveats; empty when none."
},
"domain": {
"type": "string",
"examples": [
"github.com"
],
"description": "The domain as given."
},
"reason": {
"enum": [
"mailbox_exists",
"invalid_syntax",
"domain_not_found",
"domain_accepts_no_mail",
"no_mail_server",
"mailbox_not_found",
"disposable_domain",
"accept_all_domain",
"smtp_refused",
"smtp_try_later",
"smtp_unreachable",
"smtp_inconclusive"
],
"type": "string",
"examples": [
"mailbox_exists"
],
"description": "Why the verdict is what it is."
},
"mailbox": {
"type": "object",
"required": [
"checked",
"exists",
"catch_all",
"smtp_code",
"smtp_message",
"mx_host"
],
"properties": {
"exists": {
"type": [
"boolean",
"null"
],
"examples": [
true
],
"description": "The mailbox exists; null when it could not be proved."
},
"checked": {
"type": "boolean",
"examples": [
true
],
"description": "The mail server gave a yes-or-no answer about the mailbox."
},
"mx_host": {
"type": [
"string",
"null"
],
"examples": [
"aspmx.l.google.com"
],
"description": "The mail server that answered."
},
"catch_all": {
"type": [
"boolean",
"null"
],
"examples": [
false
],
"description": "The server also accepted a random address on the domain; null when not tested."
},
"smtp_code": {
"type": [
"integer",
"null"
],
"examples": [
250
],
"description": "The server's reply code to the mailbox question."
},
"smtp_message": {
"type": [
"string",
"null"
],
"examples": [
"2.1.5 OK"
],
"description": "The server's reply text, trimmed."
}
},
"description": "What the mail server said."
},
"verdict": {
"enum": [
"deliverable",
"undeliverable",
"risky",
"unknown"
],
"type": "string",
"examples": [
"deliverable"
],
"description": "deliverable: the mail server confirmed the mailbox. undeliverable: bad syntax, no such domain, no mail server, or no such mailbox. risky: disposable domain or a server that accepts every address. unknown: the server would not say."
},
"checked_at": {
"type": "string",
"format": "date-time",
"examples": [
"2026-09-26T18:00:00Z"
],
"description": "When this node read the source (UTC). Nothing here is cached."
},
"disposable": {
"type": "boolean",
"examples": [
false
],
"description": "The domain is a known throwaway-mail domain."
},
"local_part": {
"type": "string",
"examples": [
"support"
],
"description": "The part before @."
},
"normalized": {
"type": [
"string",
"null"
],
"examples": [
"support@github.com"
],
"description": "Local part with the domain lower-cased and punycoded; null when the syntax is invalid."
},
"accepts_mail": {
"type": [
"boolean",
"null"
],
"examples": [
true
],
"description": "The domain has somewhere to deliver mail (MX or address fallback); null when not looked up."
},
"did_you_mean": {
"type": [
"string",
"null"
],
"examples": [
"jane@gmail.com"
],
"description": "A likely intended address when the domain looks like a typo of a common provider."
},
"domain_ascii": {
"type": [
"string",
"null"
],
"examples": [
"github.com"
],
"description": "The domain in ASCII (punycode for internationalised names); null when invalid."
},
"role_account": {
"type": "boolean",
"examples": [
true
],
"description": "The local part is a role (info, sales, support...), not a person."
},
"syntax_valid": {
"type": "boolean",
"examples": [
true
],
"description": "The address is well-formed."
},
"domain_exists": {
"type": [
"boolean",
"null"
],
"examples": [
true
],
"description": "The domain exists in DNS; null when not looked up."
},
"free_provider": {
"type": "boolean",
"examples": [
false
],
"description": "A free consumer mail provider (gmail.com, outlook.com...)."
},
"mail_provider": {
"type": [
"string",
"null"
],
"examples": [
"google"
],
"description": "Who runs the domain's mail (google, microsoft, yahoo, zoho, proton, amazon_ses...); null when not recognised."
},
"disposable_list_as_of": {
"type": [
"string",
"null"
],
"examples": [
"2026-09-28"
],
"description": "Date of the disposable-domain list used."
}
}
},
"status": {
"type": "string",
"const": "ok",
"description": "Present only on a delivered result."
},
"worker": {
"type": "string",
"examples": [
"market.quote"
],
"description": "Catalog name of the worker that ran."
},
"price_usd": {
"type": "number",
"examples": [
0.02
],
"description": "What this call cost, in USD."
},
"provenance": {
"type": "object",
"required": [
"steps",
"providers_used",
"attempts",
"elapsed_ms"
],
"properties": {
"steps": {
"type": "array",
"items": {
"type": "object",
"required": [
"step",
"ok",
"ms"
],
"properties": {
"ms": {
"type": "integer",
"examples": [
312
],
"description": "Milliseconds the step took."
},
"ok": {
"type": "boolean",
"examples": [
true
],
"description": "Whether the step succeeded."
},
"step": {
"type": "string",
"examples": [
"quote"
],
"description": "Step name inside the worker."
},
"reason": {
"type": "string",
"examples": [
"provider_timeout"
],
"description": "Failure reason, on a failed step."
},
"provider": {
"type": "string",
"examples": [
"coinbase-advanced-trade-public"
],
"description": "Provider that served the step."
}
},
"description": "One step of the job."
},
"description": "Every step the job ran, in order."
},
"attempts": {
"type": "integer",
"examples": [
1
],
"description": "Provider attempts made, including retries and failovers."
},
"elapsed_ms": {
"type": "integer",
"examples": [
340
],
"description": "Wall-clock milliseconds for the whole job."
},
"providers_used": {
"type": "array",
"items": {
"type": "string",
"examples": [
"coinbase-advanced-trade-public"
],
"description": "Provider name."
},
"examples": [
[
"coinbase-advanced-trade-public"
]
],
"description": "Providers that served the job."
}
},
"description": "How the result was produced: which providers ran and how long each took."
},
"receipt_id": {
"type": "string",
"examples": [
"rcpt_9f1c2b3a4d5e6f70"
],
"description": "Receipt id for this job."
},
"attribution": {
"type": "array",
"items": {
"type": "object",
"required": [
"text",
"url"
],
"properties": {
"url": {
"type": "string",
"examples": [
"https://translate.google.com"
],
"description": "Link."
},
"text": {
"type": "string",
"examples": [
"Translated by Google"
],
"description": "Credit."
}
},
"description": "A credit."
},
"description": "Present only when the result's text was machine-translated: the credit to show with it."
},
"receipt_url": {
"type": "string",
"examples": [
"/work/receipts/rcpt_9f1c2b3a4d5e6f70"
],
"description": "Where to fetch the machine-readable receipt (free, no payment)."
},
"billing_warning": {
"type": "string",
"examples": [
"settlement pending"
],
"description": "Present only when the charge was recorded with a caveat."
}
},
"description": "The 200 body of every paid /work call. `result` is the worker's own output (its schema is per route); everything else is the same on every /work route. A receipt for the job is at `receipt_url`."
}
}
}
}
}
}
},
"alternative": {
"detail": "A prepaid key: bought with the MPP top-up rail in `other_rails` where that rail is live, and spent per call at the same rates. There are no subscriptions; pay per call with a rail in `accepts`.",
"header": "X-API-Key"
},
"other_rails": [
{
"asset": "0x20C000000000000000000000b9537d11c60E8b50",
"method": "tempo",
"chain_id": 4217,
"protocol": "mpp",
"recipient": "0xc4a6aa93ba00d5c02145c33fe6f2212654fcdfb7",
"challenge_in": "WWW-Authenticate",
"send_via_header": "Authorization: Payment ...",
"amount_minor_units": "20000"
},
{
"note": "Send the amount of this token to the recipient yourself, wait for the receipt, then present the transaction hash. No signature is verified, so smart-wallet payers can use this rail.",
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"method": "evm",
"network": "eip155:8453",
"chain_id": 8453,
"protocol": "mpp",
"recipient": "0x837C40E2B4e976f43Ffb4451eE281A00fA9477dd",
"challenge_in": "WWW-Authenticate",
"send_via_header": "Authorization: Payment ...",
"credential_types": [
"hash"
],
"amount_minor_units": "20000"
}
],
"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 0x837C…477dd. The signed payment is good for 5 minutes.
- Paid to
- 0x837C…477dd
- USD Coin contract
- 0x8335…02913
- Payment window
- 5 minutes
- As published
- 20000 smallest units
20000units
on solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp · exact scheme
That figure is in the token’s smallest units. Roundhouse does not hold this contract’s decimals, so it is shown as published rather than converted.
- Paid to
- J1K4md…2icSh
- Token contract
- EPjFWd…TDt1v
- Payment window
- 5 minutes
The catalog’s raw entry
[
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0x837C40E2B4e976f43Ffb4451eE281A00fA9477dd",
"amount": "20000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 300
},
{
"asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
"extra": {
"feePayer": "BENrLoUbndxoNMUS5JXApGMtNykLjFXXixMtpDwDR9SP"
},
"payTo": "J1K4mdbvXEbJLRKpgxFcA7s66LWMCYHu71ye6Hz2icSh",
"amount": "20000",
"scheme": "exact",
"network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
"maxTimeoutSeconds": 300
}
]Extensions
{
"bazaar": {
"info": {
"input": {
"body": {
"email": "support@github.com"
},
"type": "http",
"method": "POST",
"bodyType": "json"
},
"output": {
"type": "json",
"example": {
"result": {
"mx": [],
"email": "support@github.com",
"notes": [],
"domain": "github.com",
"reason": "mailbox_exists",
"mailbox": {
"exists": true,
"checked": true,
"mx_host": "aspmx.l.google.com",
"catch_all": false,
"smtp_code": 250,
"smtp_message": "2.1.5 OK"
},
"verdict": "deliverable",
"checked_at": "2026-09-26T18:00:00Z",
"disposable": false,
"local_part": "support",
"normalized": "support@github.com",
"accepts_mail": true,
"did_you_mean": null,
"domain_ascii": "github.com",
"role_account": true,
"syntax_valid": true,
"domain_exists": true,
"free_provider": false,
"mail_provider": "google",
"disposable_list_as_of": "2026-09-28"
},
"status": "ok",
"worker": "email.verify",
"price_usd": 0.02,
"provenance": {
"steps": [
{
"ms": 640,
"ok": true,
"step": "verify",
"provider": "mailcheck"
}
],
"attempts": 1,
"elapsed_ms": 660,
"providers_used": [
"mailcheck"
]
},
"receipt_id": "rcpt_9f1c2b3a4d5e6f70",
"receipt_url": "/work/receipts/rcpt_9f1c2b3a4d5e6f70"
}
}
},
"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": [
"email"
],
"properties": {
"email": {
"type": "string",
"maxLength": 320,
"minLength": 3
},
"language": {
"type": "string",
"pattern": "^[A-Za-z]{2,3}(-[A-Za-z0-9]{2,8})*$",
"maxLength": 35
}
},
"additionalProperties": false
},
"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"
}
}
}
}
}
}
}Provenance
- Seen in the source catalog
- 2026-10-19 06:35Z
- Last indexed by Roundhouse
- 2026-10-23 20:20Z
- Last enriched (probe, favicon, geo)
- 2026-10-01 03:45Z
- x402 version
- 2
- Max timeout
- 300s
- Liveness probe
- HTTP 402
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. 29 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 HubVibe 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=HubVibe' 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://hubvibe-io.com/work/email/verify, 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. Either pay over x402 (mint a personal key for $0.01 at GET https://api.roundhouseai.io/v0/test/x402), or ask me for an organization key, which I create at https://roundhouseai.io/dashboard/connections. If you have neither, ask before going further. If you do not have Roundhouse tools or skills installed, read https://roundhouseai.io/skill.md first — it is the whole procedure.