Email x402 REST usage
Find email address for a person synchronously. Provide name + company or LinkedIn URL.
0.03 USDC per call
per call
← All services
Daily transfers, volume and coverage →
Contact Verify
x402 resource x402 RESTverify-x402.okwithit9.workers.dev · verify-x402.okwithit9.workers.dev · Comms & Messaging
Email verification / validate email: checks if an email address is real and deliverable (SMTP mailbox check), flags disposable, catch-all and role emails. Use before sending, for lead lists, CRM cleanup and sign-up fraud checks. $0.01.
Price per call
0.01 USDC per call
published unit: per call
Calls · 30d
5
counted by the source, no daily split
Payers · 30d
3
distinct paying addresses seen by the source
Observed inflows · 30d
$0.207
15 transfers to the payout address
Inflow growth · 7d
—
not comparable (baseline under $1 or window incomplete)
Payment evidence
Observed transfers
confidence: medium
· read 2026-10-31
Observed inflows · last 30 days
$0.10USD observed / day
2026-10-01grey = not scanned · UTC days2026-10-30
| Window | Observed | Transfers |
|---|---|---|
| Last complete day (2026-10-30) | $0.00 | 0 |
| Last 7 days | $0.00 | 0 |
| Last 30 days | $0.207 | 15 |
| Growth, 7d against the 7 before | not comparable | |
Daily history →. Observed transfers show value arriving at the payout address; they do not establish service revenue.
Blockchain wallets
Full addresses · public payment evidenceReceiving wallets are payment addresses published for this service. Sending wallets transferred funds to an exclusive receiving address; this alone does not prove a purchase or identify an agent.
Receiving wallets · provider payment addresses
| Network | Full wallet address | Evidence |
|---|---|---|
| Base | 0xe11d7ff8c7573b15f9f6f6d4961afb4109d3dda5 | Exclusive to this catalogue serviceFrom source record · source: x402_bazaar |
Sending wallets · observed counterparties
No sending wallet addresses have been retained for this service. Buyer wallets are unknown; daily totals and reported payer counts do not reveal their addresses.
Coverage includes retained scans only, not every historical transaction. Earlier daily totals cannot recover sender addresses. Sender lists exclude shared receiving wallets, whose transfers could belong to another service. A provider address does not establish wallet ownership.
Competitors & category benchmark
Rank the whole category →
Closest competitors
Comms & Messaging
- Email 2,674 calls · 0.03 USDC per call —
- Mx lookup 1,065 calls · 0.0216 USDC per call —
- Email validate 559 calls · 0.0324 USDC per call —
- Person profile 541 calls · 0.001 USDC per call —
- DYOE Contact Extraction 535 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
3,052 services in this category
| With a measured call count | 909 (29.8 %) |
|---|---|
| With a published price | 1,053 (34.5 %) |
| With attributable inflows | 30 (1.0 %) |
| Observed inflows · 30d | $52.15 |
| Median measured calls | 1 |
| Median price per call | $0.01 |
Similar services
All of Comms & Messaging →Mx lookup x402 REST usage
Mail Server Lookup: Look up a domain's MX, A, AAAA, NS, TXT and SOA records, identify its email provider, and show its SPF and DMARC records.
0.0216 USDC per call
per call
Email validate x402 REST usage
Email Validation: Check email syntax, mail-server records, disposable domains, role addresses and likely typos. Returns checks without confirming a mailbox exists.
0.0324 USDC per call
per call
Person profile x402 REST usage
Profile enrichment from a name and company, an email, a phone or a profile URL. Phone lookup is off by default. include_phone=true adds the per-person add-on on the pricing page for up to one person; no phone hit is guar...
0.001 USDC per call
per call
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.
Service details, payment routes and source evidence
Where you can pay
1 route from the provider's payment requirements| Network | Scheme | Amount | Asset |
|---|---|---|---|
| Base | exact | 0.02 | USDC |
“exact” is the price per call. “upto” is a ceiling the client sets, not a price. Atomic amount 10000 = 0.01 USDC per call on Base.
What you can call
access: payment per call (x402)endpoint
https://verify-x402.okwithit9.workers.dev/verify/email
Request
{
"method": "GET",
"queryParams": {
"email": {
"description": "Email address to verify. Syntax is checked before payment.",
"example": "ada@example.com",
"required": true,
"type": "string"
}
},
"type": "http"
}
Response
{
"example": {
"can_connect_smtp": true,
"domain": "example.com",
"email": "ada@example.com",
"has_inbox_full": false,
"is_catch_all": false,
"is_deliverable": true,
"is_disabled": false,
"is_disposable": false,
"is_free_email": false,
"is_role_account": false,
"is_safe_to_send": true,
"is_spamtrap": false,
"is_valid_syntax": true,
"mx_accepts_mail": true,
"mx_records": [
"mx.example.com"
],
"overall_score": 98,
"status": "safe",
"username": "ada"
},
"type": "json"
}
Examples are the provider's own, not a call we made.
Opportunity insights
2 findings from measured data-
Call count and inflow disagree
The observed inflow implies about 21 calls at list price; the source counted 5 (factor 4). Either the effective price differs from the list price, or part of the volume belongs to other payers on the same address. Do not read the inflow as this service's revenue.
Peers with attributed inflows → -
Category benchmark
30 of 3,052 services (1.0%) in Comms & Messaging have attributable inflows; 909 have a source-measured call count. Median measured calls: 1.
Rank this category by observed inflows →
What the provider says
Email verification / validate email: checks if an email address is real and deliverable (SMTP mailbox check), flags disposable, catch-all and role emails. Use before sending, for lead lists, CRM cleanup and sign-up fraud checks. $0.01.
Quoted from x402 Bazaar · source record · read 2026-10-31
Facts and where they come from
- Price
-
0.01 USDC per call
Provider claim
Recorded value: 0.02 USDC per call.
- Unit
- per call
- Protocol
- x402, REST · transport: HTTP Provider claim
- Auth
- x402
- Source
- x402 Bazaar (Coinbase CDP) · Public discovery API (provider-published records)
- Last checked
- Not checked by us yet — the data is as the source published it
- First seen
- 2026-10-24
- Usage
- 5 calls · 3 unique payers in the 30 days before 2026-10-24. Measured by the x402 Bazaar, not by us and not by the provider.
Money, and what it actually proves
Verified revenue · 30d
Unknown
Observed inflows · 30d
$0.207
Attribution
Exclusive
Receipt ledger
Not connected
Observed transfers
· confidence medium
Token transfers reached this service's own payout address. A transfer is not a purchase, and shared, refunded or unrelated transfers cannot be excluded.
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 $0.207 arriving at the payout address in 30 days — that is volume, and a lower bound: transfers can be refunds, treasury moves, or payments for something else entirely.
Cross-check. At the published price the observed inflow would cover about 21 calls; the source counted 5. Two independent measurements of the same question — they never match exactly, because the effective price differs per call size and the address can also receive unrelated transfers.
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
0xE11d7Ff8c7573b15F9F6F6d4961Afb4109d3ddA5
0.02 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.
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://verify-x402.okwithit9.workers.dev/verify/phone
EvidenceAls Resource-URL im Bazaar-Eintrag geführt. |
api.cdp.coinbase.com | 2026-10-31 |
| Input output | Provider claim |
Request/response examples published with the listing
EvidenceBeispiel-Ein- und -Ausgabe stammen aus dem Bazaar-Eintrag des Anbieters. |
api.cdp.coinbase.com | 2026-10-31 |
| Payment | Provider claim |
1 rail: Base · payee 0xE11d7Ff8c7573b15F9F6F6d4961Afb4109d3ddA5
EvidenceAus 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. |
api.cdp.coinbase.com | 2026-10-31 |
| Pricing | Provider claim |
0.02 USDC per call
EvidenceAtomic amount 20000 = 0.02 USDC per call on Base. Netzwerk: Base. |
api.cdp.coinbase.com | 2026-10-31 |
| Protocol | Provider claim |
x402 (HTTP 402 payment challenge)
EvidenceIm x402 Bazaar als zahlungspflichtige HTTP-Ressource gelistet (x402Version 2, Typ http). |
api.cdp.coinbase.com | 2026-10-31 |
| Provider | Provider claim |
verify-x402.okwithit9.workers.dev
EvidenceDie Ressource wird unter diesem Host im x402 Bazaar geführt; die Angaben stammen vom Anbieter. |
api.cdp.coinbase.com | 2026-10-31 |
| Usage | Verified |
3 calls / 2 unique payers in the last 30 days
EvidenceSource-reported usage from Coinbase x402 Bazaar, read on 2026-10-31. Letzter Aufruf laut Quelle: 2026-10-17T16:18:53.356Z. Aufrufe sind kein Umsatz. |
api.cdp.coinbase.com | 2026-10-31 |
Endpoint checks
We have not called this endpoint yet. Until we do, everything above is what the source published — no more.