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deliverability

x402 resource x402 REST

sigtap-outreach-api.sigtap.workers.dev · sigtap-outreach-api.sigtap.workers.dev · Comms & Messaging

not indexed Provider site ↗ How sources are measured

Email deliverability check: SPF, DKIM, DMARC and MX record audit for a sending domain

Price per call 0.003 USDC per call published unit: per call

Calls · 30d — not reported by any source

Payers · 30d — not reported by any source

Observed inflows · 30d — not attributable

Inflow growth · 7d — not comparable (baseline under $1 or window incomplete)

Payment evidence Attribution blocked confidence: low · read 2026-10-29

Where you can pay

1 route from the provider's payment requirements

Payment networks and amounts published for deliverability.
Network	Scheme	Amount	Asset
Base	exact	0.003	USDC

“exact” is the price per call. “upto” is a ceiling the client sets, not a price. Atomic amount 3000 = 0.003 USDC per call on Base.

What you can call

access: payment per call (x402)

endpoint https://sigtap-outreach-api.sigtap.workers.dev/deliverability

Request

{
    "type": "http",
    "method": "GET",
    "queryParams": {
        "domain": "Sending domain to audit, e.g. openai.com"
    }
}

Response

{
    "type": "json",
    "example": {
        "spf": {
            "found": true,
            "issue": null,
            "record": "v=spf1 ...",
            "all_in_one": true
        },
        "dkim": [],
        "dmarc": {
            "found": true,
            "policy": "none"
        },
        "checks": [],
        "domain": "example.com",
        "verdict": "ready-to-send"
    }
}

Examples are the provider's own, not a call we made.

Observed inflows · last 30 days

No inflow observed in this window

The payout address is also published by 11 other service(s); the volume cannot be attributed to one of them.

Observed inflows by window for deliverability.
Window	Observed	Transfers
Last complete day (2026-10-28)	—	—
Last 7 days	—	—
Last 30 days	—	—
Growth, 7d against the 7 before	not comparable

Source: on-chain transfer scan (USDC on Base) Window: 2026-09-29 → 2026-10-28 Scanned: 30/30 days Sample: 0 days with a transfer First seen: never Last update: 2026-10-28

Daily history → · what a transfer does and does not prove

Opportunity insights

2 findings from measured data

Payment attribution is blocked

The payout address is shared with 11 other service(s). That is normal for facilitator and platform addresses, and it is why this profile shows no inflow figure. The volume exists — it just cannot be split without inventing a rule.
How attribution works →
Category benchmark

30 of 3,023 services (1.0%) in Comms & Messaging have attributable inflows; 888 have a source-measured call count. Median measured calls: 1.
Rank this category by observed inflows →

What the provider says

Email deliverability check: SPF, DKIM, DMARC and MX record audit for a sending domain

Quoted from PayAI · source record · read 2026-10-29

Facts and where they come from

Price: 0.003 USDC per call Provider claim
Recorded value: 0.003 USDC per call.
Unit: per call
Protocol: x402, REST · transport: HTTP Provider claim
Auth: x402
Endpoint: https://sigtap-outreach-api.sigtap.workers.dev/deliverability
Source: PayAI · Public discovery API (provider-published records)
Last checked: Not checked by us yet — the data is as the source published it
First seen: 2026-10-26

Money, and what it actually proves

Verified revenue · 30d Unknown

Observed inflows · 30d —

Attribution Shared

Receipt ledger Not connected

Attribution blocked · confidence low
The payout address is also published by 11 other service(s); the volume cannot be attributed to one of them.

Why revenue is “unknown”. A revenue figure needs a receipt: an amount a buyer actually paid for this service. We hold none for this entry, and we hold no funds at all. What we have instead is nothing measurable: no price, no attributable address, no receipt. The payout address is also published by 11 other service(s); the volume cannot be attributed to one of them.

Daily market statistics — the ledger view, day by day

No daily history has been archived for this service yet. Open the full daily history →

Payment rails

Base · exact · USDC

0x963d450CA601d52B5D92a8540Aea8D4272223ae1

0.003 USDC

From source record

A payment rail is where the provider asks to be paid. It is not proof that anything was paid through it. See evidence levels.

Provenance

One row per statement. “Verified” means we checked it ourselves and the finding is quoted. “Provider claim” means we read it in the provider's own record. “Not found” is a statement about our search, not proof of absence.

Statement	Status	What we found	Source	Checked
Endpoint	Provider claim	https://sigtap-outreach-api.sigtap.workers.dev/deliverability Evidence Als Resource-URL im Bazaar-Eintrag geführt.	facilitator.payai.network	2026-10-29
Input output	Provider claim	Request/response examples published with the listing Evidence Beispiel-Ein- und -Ausgabe stammen aus dem Bazaar-Eintrag des Anbieters.	facilitator.payai.network	2026-10-29
Payment	Provider claim	1 rail: Base · payee 0x963d450CA601d52B5D92a8540Aea8D4272223ae1 Evidence Aus den `accepts`-Einträgen: Netzwerk, Asset, Empfängeradresse und Betrag. Die Adresse ist die Grundlage der späteren On-Chain-Zuordnung; sie ist noch nicht durch eine eigene 402-Antwort bestätigt.	facilitator.payai.network	2026-10-29
Pricing	Provider claim	0.003 USDC per call Evidence Atomic amount 3000 = 0.003 USDC per call on Base. Netzwerk: Base.	facilitator.payai.network	2026-10-29
Protocol	Provider claim	x402 (HTTP 402 payment challenge) Evidence Im x402 Bazaar als zahlungspflichtige HTTP-Ressource gelistet (x402Version 2, Typ http).	facilitator.payai.network	2026-10-29
Provider	Provider claim	sigtap-outreach-api.sigtap.workers.dev Evidence Die Ressource wird unter diesem Host im x402 Bazaar geführt; die Angaben stammen vom Anbieter.	facilitator.payai.network	2026-10-29

Endpoint checks

We have not called this endpoint yet. Until we do, everything above is what the source published — no more.

Price

0.003 USDC per call

price checked 2026-10-29 Open at sigtap-outreach-api.sigtap.workers.dev

You buy from the provider, not from us. This page takes no payment, holds no funds and stores no wallet keys.

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Competitors & category benchmark

Rank the whole category →

Closest competitors Comms & Messaging

Email 2,674 calls · 0.03 USDC per call —
DYOE Contact Extraction 831 calls · 0.01 USDC per call —
Email validate 596 calls · 0.0324 USDC per call —
Person profile 541 calls · 0.001 USDC per call —
Match 319 calls · 0.01 USDC per call —

Sorted by source-measured calls, not by our opinion. The right-hand figure is observed inflow, which stays empty for peers whose address is shared.

Category benchmark 3,023 services in this category

With a measured call count	888 (29.4 %)
With a published price	1,025 (33.9 %)
With attributable inflows	30 (1.0 %)
Observed inflows · 30d	$52.88
Median measured calls	1
Median price per call	$0.01

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Chosen by category and by whether we have measured them, not by who pays us. A sponsored placement in this list is labelled as such.