gapfill
Email authentication and deliverability checks for up to 10 sending domains in one call, $0.002 a domain, settled as one payment: SPF with lookup count, DKIM keys, DMARC policy, MX, MTA-STS, TLS-RPT and BIMI, every problem named with its fix and an A–F grade per domain. For deliverability audits across a portfolio of domains. All or nothing: if any domain can't be checked, nothing is charged and each failure is named.
DataUnknowneip155:8453Exactvia cdp
EmailSpfDkimDmarcBatch
Settlements · 30d
17
No per-endpoint history for this service yet, so this is payments indexed to its PROVIDER's wallet over 30 days.
$0.07
Verified settled volume
17 settlements proven x402 by their on-chain EIP-3009 marker.
$0.0040
Listed price
As published in the catalog. Always read the live 402 before paying.
1
Calls · 30d
Upstream's own call count for this endpoint, not ours.
1
Unique payers · 30d
Last called 2026-10-26 10:38Z
—
Upstream on-chain volume
Reported by the source catalog.
Paid to
0x91A71892231A256d69d4bf8a442234701a762AaFThe 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.
Accepts
The payment requirements as published to the catalog. Read the live 402 before paying — a price here is a claim, not a quote.
0.004USDC≈ $0.004 USD
on Base · exact scheme
Pay 0.004 USDC on Base to 0x91A7…62AaF. The signed payment is good for 5 minutes.
- Paid to
- 0x91A7…62AaF
- USD Coin contract
- 0x8335…02913
- Payment window
- 5 minutes
- As published
- 4000 smallest units
The catalog’s raw entry
[
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0x91A71892231A256d69d4bf8a442234701a762AaF",
"amount": "4000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 300
}
]Extensions
{
"bazaar": {
"info": {
"input": {
"body": {
"domains": [
"github.com",
"example.com"
]
},
"type": "http",
"method": "POST",
"bodyType": "json"
},
"output": {
"type": "json",
"example": {
"count": 1,
"results": [
{
"mx": {
"found": true,
"hosts": [
{
"host": "smtp.google.com",
"preference": 1
}
],
"null_mx": false
},
"spf": {
"found": true,
"issues": [],
"record": "v=spf1 include:_spf.google.com -all",
"mechanisms": [
"include:_spf.google.com",
"-all"
],
"all_qualifier": "-all",
"dns_lookup_count": 4
},
"bimi": {
"found": false,
"issues": [],
"record": null
},
"dkim": {
"found": true,
"issues": [],
"records": [
{
"issues": [],
"record": "v=DKIM1; k=rsa; p=MIIBIjAN...",
"key_type": "rsa",
"selector": "google",
"key_length_bits": 2048
}
],
"selectors_checked": [
"default",
"google"
],
"selectors_unknown": []
},
"dmarc": {
"pct": 100,
"rua": [
"mailto:dmarc@example.com"
],
"ruf": [],
"aspf": null,
"adkim": null,
"found": true,
"issues": [
"p=none only monitors: spoofed mail is still delivered"
],
"policy": "none",
"record": "v=DMARC1; p=none; rua=mailto:dmarc@example.com",
"inherited_from": null,
"subdomain_policy": null
},
"fixes": [
{
"fix": "change p=none to p=quarantine, then p=reject, at _dmarc.example.com once aggregate reports show all legitimate mail passing",
"issue": "p=none only monitors: spoofed mail is still delivered"
}
],
"grade": "B",
"notes": [],
"score": 85,
"domain": "example.com",
"mta_sts": {
"found": false,
"issues": [],
"record": null
},
"tls_rpt": {
"found": false,
"issues": [],
"record": null
},
"resolves": true,
"deductions": [
{
"points": 15,
"reason": "DMARC p=none"
}
]
}
]
}
}
},
"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": [
"domains"
],
"properties": {
"domains": {
"type": "array",
"items": {
"type": "string"
},
"maxItems": 10,
"minItems": 1,
"description": "1 to 10 items, $0.002 each, settled as one payment"
},
"dkimSelectors": {
"type": "array",
"items": {
"type": "string"
},
"maxItems": 4,
"description": "Extra DKIM selectors to check before the common ones (dkim_selectors also accepted)"
}
}
},
"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",
"required": [
"count",
"results"
],
"properties": {
"count": {
"type": "integer"
},
"results": {
"type": "array",
"items": {
"type": "object",
"required": [
"domain",
"grade",
"score",
"deductions",
"fixes",
"spf",
"dkim",
"dmarc",
"mx"
],
"properties": {
"mx": {
"type": "object"
},
"spf": {
"type": "object"
},
"bimi": {
"type": "object",
"description": "found is null when the lookup failed, with a lookup_failed issue naming the record"
},
"dkim": {
"type": "object",
"description": "selectors_unknown lists selectors whose lookup failed (a lookup_failed issue each); found is null when no key was found and some are unknown"
},
"dmarc": {
"type": "object",
"description": "inherited_from names the parent domain whose record applies when the domain has none"
},
"fixes": {
"type": "array",
"items": {
"type": "object",
"properties": {
"fix": {
"type": "string"
},
"issue": {
"type": "string"
}
}
},
"description": "Every issue in the report, each with a one-line fix"
},
"grade": {
"enum": [
"A",
"B",
"C",
"D",
"F"
],
"type": "string"
},
"notes": {
"type": "array",
"items": {
"type": "string"
},
"description": "How the input was read, when it was changed"
},
"score": {
"type": "integer",
"maximum": 100,
"minimum": 0
},
"domain": {
"type": "string"
},
"mta_sts": {
"type": "object",
"description": "found is null when the lookup failed, with a lookup_failed issue naming the record"
},
"tls_rpt": {
"type": "object",
"description": "found is null when the lookup failed, with a lookup_failed issue naming the record"
},
"resolves": {
"type": "boolean",
"description": "The domain has an A record or a mail server"
},
"deductions": {
"type": "array",
"items": {
"type": "object",
"properties": {
"points": {
"type": "integer"
},
"reason": {
"type": "string"
}
}
}
}
}
}
}
}
}
}
}
}
}
}
}Provenance
- Seen in the source catalog
- 2026-10-26 10:38Z
- Last indexed by Roundhouse
- 2026-10-26 17:20Z
- Last enriched (probe, favicon, geo)
- —
- x402 version
- 2
- Max timeout
- 300s
- Liveness probe
- Not probed
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 gapfill 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=gapfill' 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://jotowl.com/v1/email/auth/batch, 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.