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411data Lead Enrichment — Slot Person (Person Intermediate Pass)
x402
411data Lead Enrichment — Slot Person (Person Intermediate Pass) is a paid API for AI agents from 411data.io, paid per call via x402, $0.35/call, status unknown (last checked 2026-09-15).
Enriches a CRM lead by researching and slotting a specific contact person into the lead graph, returning matched phone numbers, contact name, title, and a summary markdown — billed only on match.
Price / call$0.35
Success—
StatusUnknown
How this service works
B2B lead enrichment API: find business emails, phone numbers, and contact data for lead generation. Bill-on-match pricing, free trial, agent-native REST + enrich agent.
Output
Returns a JSON object indicating whether a match was found (matched: true/false), billed status, the enriched contact name and title, verified phone numbers with confidence scores, a markdown summary of the business and contact, the session persistence details (leb_id, applied, contact_id), coverage metrics, latency, and whether a person hunt sub-task was executed and its cost breakdown.
Example use cases
Identify owner of small business lead
“I've got a CRM lead for a furniture store in New Castle, PA — Haney Furniture Co, contact_id 81555753, session id sess_001abc. Can you run the person slot pass to find out who the actual owner is and get their verified phone number?”
Patch lead graph with decision-maker
“My sales session chat_session_id is biz_sess_99xz and I need to patch the lead graph for contact c_4471 at a hardware company in Pittsburgh — run the person intermediate enrichment and give me the matched name, title, and phone.”
Person hunt for a cold outreach list entry
“I'm working a B2B outreach list and need to find the real contact person at a small plumbing company in Allentown PA — company is listed in my CRM with contact_id 72301 and session id sess_774kq. Use 411data to slot the person and return their phone and job title.”
Technical details
Endpoint
POSThttps://411data.io/api/v1/enrich/lead-session/slot-personWhen to prefer
Use this endpoint when you have an active 411data lead enrichment session and need to research and slot a specific contact person (owner, manager, decision-maker) into the lead graph for a CRM lead. It is purpose-built for the person intermediate pass within a multi-step agentic enrichment workflow, optionally triggering a person hunt sub-task. Prefer it over the top-level session endpoint when you already have a session open and only need to patch a single contact slot rather than run a full company + people pipeline.
Side effects
- No match found (matched: false) — not billed but returns empty backfill
- Invalid or mismatched contact_id causing session graph corruption
- chat_session_id not found or expired — session context unavailable
- Person hunt sub-task fails (slot_result.error non-null) — partial result returned
- Rate limit or payment failure — 402 response before execution
- Stale prior_backfill graph leads to idempotent_replay returning cached result
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| lead | object | The same bound CRM lead passed to enrich/lead-session. Keep contact_id stable; never swap in a legal entity name discovered mid-session. |
| prompts | array | Follow-up instructions to focus this pass. |
| target_name | string | Display name override; resolved from backfill.contacts when omitted. |
| progress_key | string | Opaque key for streaming progress reads; cleared when the op finishes. |
| prior_backfill | object | Current lead_enrichment_v1 graph; loaded from the chat session when omitted. |
| research_model | string | Override the research model for this pass. |
| chat_session_id | string | chat_session_id of the completed session whose graph is being patched. |
| refresh_summary | boolean | |
| target_contact_id | string | id of the backfill.contacts[] row to research. |
| include_person_hunt | boolean | Queue a person hunt for this contact after the intermediate search when one has not already run. |
Output
Schema · Response
{
"type": "json",
"example": {
"billed": true,
"status": "complete",
"matched": true,
"persist": {
"leb_id": 42,
"applied": true,
"contact_id": 81555753,
"idempotent_replay": false
},
"backfill": {
"phones": [
{
"label": "main",
"score": 91,
"number": "(724) 654-7732"
}
],
"contacts": [
{
"name": "James W Cole Sr",
"title": "Owner"
}
],
"schema_version": "1.0"
},
"coverage": {
"must_phones_hit": 1,
"must_phones_total": 1
},
"endpoint": "enrich/lead-session/slot-person",
"spent_usd": 0.09,
"slot_label": "Person Intermediate",
"slot_result": {
"error": null,
"matched": true,
"latency_ms": 11080
},
"target_name": "James W Cole Sr",
"wall_time_ms": 18420,
"person_hunt_ran": true,
"person_hunt_usd": 0.05,
"summary_markdown": "# Haney Furniture Co\nMain line [(724) 654-7732](https://example.com/contact) — owner **James W Cole Sr**",
"target_contact_id": "c_4471"
}
}Tags
x402
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