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411data.io Lead Enrichment Session
x402
411data.io Lead Enrichment Session is a paid API for AI agents from 411data.io, paid per call via x402, $1.5/call, status down (last checked 2026-09-15).
Runs an agentic lead enrichment session combining directory phone/people lookup, web research fallback, and company data pass to return a summary and structured enrichment JSON for a lead.
Price / call$1.5
Success—
StatusDown
How this service works
Agentic lead enrichment session: directory phone/people hunt, research_web fallback, company pass. Returns summary_markdown + lead_enrichment_v1 backfill JSON. Minimum base price pre-charged; usage true-up when session COGS (tools + synthesis LLM) exceeds base. Bill-on-match when no usable enrichment fields are found.
Output
Returns a summary_markdown field with a human-readable enrichment summary and a lead_enrichment_v1 JSON object containing backfilled fields such as phone numbers (including mobile), email addresses, physical addresses, and company profile data. Billing is usage-based: a minimum base price is pre-charged and trued up if session compute costs exceed it; if no usable enrichment fields are found, the bill-on-match policy applies.
Example use cases
Pre-call CRM backfill for sales rep
“I've got a lead in my CRM — John Ramirez at BlueSky Logistics in Chicago — but his phone and email fields are blank. Can you run an enrichment session and fill those in along with a quick company summary?”
Prospect research before outbound email
“I'm about to cold email a prospect named Lisa Ng who supposedly runs operations at Vertex Partners in San Francisco. Can you look her up and give me her direct contact details and what you find about the company?”
Inbound lead qualification from web form
“Someone named Michael Torres just filled out our contact form with just his name and said he's from Denver — no phone or company. Can you do a lead enrichment session on him and find any phones, emails, or employer info you can?”
Technical details
Endpoint
POSThttps://411data.io/api/v1/enrich/lead-sessionWhen to prefer
Choose this endpoint when you need a comprehensive, multi-source lead enrichment that combines directory lookup, reverse phone, and web research in a single agentic session. It is especially well-suited when you want both a human-readable markdown summary and structured JSON backfill in one call, and when you can tolerate variable pricing tied to actual data found. Prefer it over single-purpose sibling endpoints when the lead's contact details are sparse and multiple enrichment strategies may be needed.
Side effects
- No enrichment fields found — bill-on-match policy applies, minimal or no charge
- Insufficient identifying information provided — session cannot locate the individual
- Rate limiting or quota exceeded — returns error indicating retry needed
- LLM synthesis failure during web research fallback — partial results returned
- Ambiguous identity match — multiple candidates found with low confidence
Tags
x402
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