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Prospect Intelligence Batch Email Lookup
x402
Prospect Intelligence Batch Email Lookup is a paid API for AI agents from prospect-intelligence.prospectintel.workers.dev, paid per call via x402, $0.08/call, status unknown (last checked 2026-10-22).
Looks up email deliverability and source data for 1–25 contacts in a single call, returning results in input order with a summary count, billed only per unique address resolved.
Price / call$0.08
Success—
StatusUnknown
How this service works
Batch email lookup: 1-25 contacts in one call, same result shape and labels as /v1/email, results in input order plus summary counts. x402 upto: you authorize up to $0.08 x unique contacts and are charged $0.08 only per address returned. Duplicates are looked up once. This request: 2 unique contact(s), maximum $0.16.
Output
An array of per-contact results in the same order as the input, each containing the email address, deliverability status (valid, accept_all, or unknown), whether the address was found or inferred, and the sources it was discovered from. Also includes summary counts of how many contacts were resolved, valid, accept_all, unknown, and how many duplicates were deduplicated.
Example use cases
Pre-campaign email list validation
“I've got a list of 20 prospects I'm about to email — can you batch-check all their email addresses to see which ones are valid, which are accept-all, and which are unknown before I hit send?”
Sales team lead enrichment
“My sales team just pulled 15 leads from a conference list with names and company domains but no emails. Can you look up their emails and tell me which were actually found vs just inferred?”
CRM hygiene before re-engagement campaign
“I need to clean up a segment of 25 dormant contacts in my CRM — run a batch email lookup on all of them so I know which addresses are still deliverable before we try to re-engage them.”
Technical details
Endpoint
POSThttps://prospect-intelligence.prospectintel.workers.dev/v1/email/batch?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need to validate or look up email data for multiple contacts (2–25) simultaneously and want to minimize round trips and cost. It deduplicates contacts automatically, so you're only billed for unique addresses resolved. Prefer the single /v1/email endpoint for one-off lookups. Use this batch endpoint when processing a prospect list, cleaning a CRM segment, or enriching leads in bulk prior to outreach.
Side effects
- Invalid or malformed email address in input — result for that contact may be marked unknown
- More than 25 contacts submitted — request rejected with an error
- Insufficient USDC balance to cover maximum charge for unique contacts — payment fails
- Domain not recognized or no data available — status returned as unknown with no sources
- Duplicate contacts charged only once but listed in output for each occurrence
Output
Schema · Response
{
"type": "json",
"example": {
"tool": "email_lookup_batch",
"billing": {
"charged_usd": 0.08,
"max_authorized_usd": 0.16
},
"results": [
{
"email": "jane@acme.com",
"index": 0,
"outcome": "found",
"recommendation": {
"action": "send"
}
},
{
"email": null,
"index": 1,
"outcome": "no_result",
"recommendation": {
"action": "do_not_send"
}
}
],
"summary": {
"send": 1,
"found": 1,
"errors": 0,
"unique": 2,
"no_result": 1,
"requested": 2,
"do_not_send": 0,
"verify_first": 0,
"send_with_caution": 0
},
"schema_version": "2.0"
}
}Tags
x402
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