# 411data Lead Enrichment — Slot Person (Person Intermediate Pass)

> 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.

## Facts

- Endpoint: POST https://411data.io/api/v1/enrich/lead-session/slot-person
- Price: $0.35/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/411data-lead-enrichment-slot-person-person-intermediate-pass-d5dc8522
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_7BAkz57Sj7nYwJLETMPbJ

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability 411data-lead-enrichment-slot-person-person-intermediate-pass-d5dc8522 -d '<json body>'
```

Example prompt: I have a CRM lead for Haney Furniture Co at 30 N Beaver St, New Castle PA 16101 — phone (724) 654-7732, contact_id 81555753, session abc12345. Run a person intermediate pass to find and slot the actual owner or decision-maker into my lead graph.

## When to prefer this

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.

## Known failure modes

- 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

## 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.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "lead": {
   "type": "object",
   "default": {
    "zip": "16101",
    "city": "New Castle",
    "state": "PA",
    "street": "30 N Beaver St",
    "company": "Haney Furniture Co",
    "number1": "7246547732",
    "contact_id": 81555753
   },
   "description": "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": {
   "type": "array",
   "items": {
    "type": "string"
   },
   "description": "Follow-up instructions to focus this pass."
  },
  "target_name": {
   "type": "string",
   "maxLength": 120,
   "description": "Display name override; resolved from backfill.contacts when omitted."
  },
  "progress_key": {
   "type": "string",
   "maxLength": 96,
   "description": "Opaque key for streaming progress reads; cleared when the op finishes."
  },
  "prior_backfill": {
   "type": "object",
   "description": "Current lead_enrichment_v1 graph; loaded from the chat session when omitted."
  },
  "research_model": {
   "type": "string",
   "maxLength": 64,
   "description": "Override the research model for this pass."
  },
  "chat_session_id": {
   "type": "string",
   "maxLength": 64,
   "minLength": 8,
   "description": "chat_session_id of the completed session whose graph is being patched."
  },
  "refresh_summary": {
   "type": "boolean",
   "default": false
  },
  "target_contact_id": {
   "type": "string",
   "maxLength": 64,
   "minLength": 2,
   "description": "id of the backfill.contacts[] row to research."
  },
  "include_person_hunt": {
   "type": "boolean",
   "default": true,
   "description": "Queue a person hunt for this contact after the intermediate search when one has not already run."
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "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"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/411data-lead-enrichment-slot-person-person-intermediate-pass-d5dc8522/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from 411data.io](https://www.zero.xyz/host/411data.io/llms.txt)