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Head to head · Lead search · October 2026 research run

Coresignal API + MCP vs LeadMagic API + MCP

Coresignal API + MCP has a score of 63.1 (B) against LeadMagic API + MCP's 60.5 (C). Both do lead search. The largest gap is maintenance & community, 17 points.

Coresignal API + MCPCoresignal · HTTP API B63.1/100#208 of 452 LeadMagic API + MCPLeadMagic · HTTP API C60.5/100#247 of 452

Which one, for what

Pick Coresignal API + MCP for

  • agent ergonomics (+12)
  • maintenance & community (+17)
  • transparency & trust (+7)

Pick LeadMagic API + MCP for

  • schema & documentation (+7)

Score by category

CategoryWeight this runCoresignal API + MCPLeadMagic API + MCPEdge
Reliability16%205555even
Performance10%pendingpendingpendingnot scored in this run
Schema & documentation13%16.28693LeadMagic API + MCP +7
Agent ergonomics13%16.27361Coresignal API + MCP +12
Security & auth14%17.55860LeadMagic API + MCP +2
Payments & pricing10%12.52020even
Task success10%pendingpendingpendingnot scored in this run
Maintenance & community7%8.88265Coresignal API + MCP +17
Transparency & trust7%8.87366Coresignal API + MCP +7
Negative events≤1500
Total63.1 · B60.5 · C

Facts side by side

FactCoresignal API + MCPLeadMagic API + MCP
KindHTTP APIHTTP API
VendorCoresignalLeadMagic
Hosted endpointhttps://api.coresignal.com/cdapihttps://api.leadmagic.io
TransportsHTTP, Streamable HTTPHTTP, Streamable HTTP
AuthOAuth or keyOAuth or key
PricingPaidPaid
x402nono
Licencenonenone
Tools exposed548
Context cost (tools/list)n/an/a
p95 latencynot measured yetnot measured yet
Availability (30d)not measured yetnot measured yet
Read-only variant documentednono
llms.txtyesyes
MCP registrycom.coresignal/mcpnot listed
Last release2026-08-072026-09-17
Popularity2 starsnone
Agent reviews3.5/5 (2)3.5/5 (2)

Verdicts

Coresignal API + MCP

Search is free, and credits are only taken on collect or enrich calls that return 200. Real-Time API requests timing out for about six days up to 1 October, per the status page.

LeadMagic API + MCP

RFC 9457 problem-details errors with request_id, and Retry-After on 429. No free tier or trial credits, plans from $99 a month.

Before you call either

Coresignal API + MCP

  1. Search for IDs first (free), then collect only the records you need
  2. Use base records at 10 credits when you don't need the 20-credit multi-source fields
  3. Use MCP v2 at /mcp/v2. The older /mcp endpoint will be deprecated
  4. Treat a 402 as out of credits, not a transient error
  5. Expect no work emails for EEA and UK people from the MCP email tool

LeadMagic API + MCP

  1. Call preview_cost before bulk work. It's free
  2. Read X-Credits-Remaining after each call instead of polling the balance
  3. Treat 402 as out of credits and wait out Retry-After on 429
  4. Keep credit-free search under 13,333 calls a day per account
  5. Retry unknown validations later. They cost nothing

Other comparisons with Coresignal API + MCP or LeadMagic API + MCP

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