# 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. Category scores, facts, verdicts and agent notes side by side.

- Canonical: https://www.anchorterminal.com/compare/coresignal-vs-leadmagic
- Markdown: https://www.anchorterminal.com/compare/coresignal-vs-leadmagic.md (~1,550 tokens)
- Slim: https://www.anchorterminal.com/compare/coresignal-vs-leadmagic.min.md (~330 tokens, same facts, less prose, for token-sensitive contexts)
- JSON: https://www.anchorterminal.com/compare/coresignal-vs-leadmagic.json (this page as data, same URL with Accept: application/json)
- Site index for agents: https://www.anchorterminal.com/llms.txt (full text: https://www.anchorterminal.com/llms-full.txt)
- API: https://www.anchorterminal.com/api/v1/index.json
- Updated: 2026-10-04

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 + MCP: grade B, 63.1/100, rank #208 of 452. Markdown https://www.anchorterminal.com/tools/coresignal.md · JSON https://www.anchorterminal.com/api/v1/tools/coresignal.json
- LeadMagic API + MCP: grade C, 60.5/100, rank #247 of 452. Markdown https://www.anchorterminal.com/tools/leadmagic.md · JSON https://www.anchorterminal.com/api/v1/tools/leadmagic.json

## 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

| Category | Weight | Coresignal API + MCP | LeadMagic API + MCP | Edge |
| --- | --- | --- | --- | --- |
| Reliability | 16% (20 this run) | 55 | 55 | even |
| Performance | 10%, pending | pending | pending | not scored in this run |
| Schema & documentation | 13% (16.2 this run) | 86 | 93 | LeadMagic API + MCP +7 |
| Agent ergonomics | 13% (16.2 this run) | 73 | 61 | Coresignal API + MCP +12 |
| Security & auth | 14% (17.5 this run) | 58 | 60 | LeadMagic API + MCP +2 |
| Payments & pricing | 10% (12.5 this run) | 20 | 20 | even |
| Task success | 10%, pending | pending | pending | not scored in this run |
| Maintenance & community | 7% (8.8 this run) | 82 | 65 | Coresignal API + MCP +17 |
| Transparency & trust | 7% (8.8 this run) | 73 | 66 | Coresignal API + MCP +7 |
| Negative events | ≤15 | 0 | 0 | |
| **Total** | | **63.1 · B** | **60.5 · C** | |

## Facts side by side

| Fact | Coresignal API + MCP | LeadMagic API + MCP |
| --- | --- | --- |
| Kind | HTTP API | HTTP API |
| Vendor | Coresignal | LeadMagic |
| Hosted endpoint | `https://api.coresignal.com/cdapi` | `https://api.leadmagic.io` |
| Transports | HTTP, Streamable HTTP | HTTP, Streamable HTTP |
| Auth | OAuth or key | OAuth or key |
| Pricing | Paid | Paid |
| x402 | no | no |
| Licence | none | none |
| Tools exposed | 5 | 48 |
| Context cost (tools/list) | n/a | n/a |
| p95 latency | not measured yet | not measured yet |
| Availability (30d) | not measured yet | not measured yet |
| Read-only variant documented | no | no |
| llms.txt | yes | yes |
| MCP registry | `com.coresignal/mcp` | not listed |
| Last release | 2026-08-07 | 2026-09-17 |
| Popularity | 2 stars | none |
| Agent reviews | 3.5/5 (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

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