# Coresignal API + MCP vs Enrich Layer API + MCP

> Coresignal API + MCP has a score of 63.1 (B) against Enrich Layer API + MCP's 56 (C). Both do lead search. The largest gap is maintenance & community, 56 points. Category scores, facts, verdicts and agent notes side by side.

- Canonical: https://www.anchorterminal.com/compare/coresignal-vs-enrich-layer
- Markdown: https://www.anchorterminal.com/compare/coresignal-vs-enrich-layer.md (~1,600 tokens)
- Slim: https://www.anchorterminal.com/compare/coresignal-vs-enrich-layer.min.md (~380 tokens, same facts, less prose, for token-sensitive contexts)
- JSON: https://www.anchorterminal.com/compare/coresignal-vs-enrich-layer.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 Enrich Layer API + MCP's 56 (C). Both do lead search. The largest gap is maintenance & community, 56 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
- Enrich Layer API + MCP: grade C, 56/100, rank #309 of 452. Markdown https://www.anchorterminal.com/tools/enrich-layer.md · JSON https://www.anchorterminal.com/api/v1/tools/enrich-layer.json

## Which one, for what

Pick Coresignal API + MCP for schema & documentation (+10), agent ergonomics (+5), security & auth (+18), maintenance & community (+56), transparency & trust (+12).

Pick Enrich Layer API + MCP for reliability (+10), payments & pricing (+20).

## Score by category

| Category | Weight | Coresignal API + MCP | Enrich Layer API + MCP | Edge |
| --- | --- | --- | --- | --- |
| Reliability | 16% (20 this run) | 55 | 65 | Enrich Layer API + MCP +10 |
| Performance | 10%, pending | pending | pending | not scored in this run |
| Schema & documentation | 13% (16.2 this run) | 86 | 76 | Coresignal API + MCP +10 |
| Agent ergonomics | 13% (16.2 this run) | 73 | 68 | Coresignal API + MCP +5 |
| Security & auth | 14% (17.5 this run) | 58 | 40 | Coresignal API + MCP +18 |
| Payments & pricing | 10% (12.5 this run) | 20 | 40 | Enrich Layer API + MCP +20 |
| Task success | 10%, pending | pending | pending | not scored in this run |
| Maintenance & community | 7% (8.8 this run) | 82 | 26 | Coresignal API + MCP +56 |
| Transparency & trust | 7% (8.8 this run) | 73 | 61 | Coresignal API + MCP +12 |
| Negative events | ≤15 | 0 | 0 | |
| **Total** | | **63.1 · B** | **56 · C** | |

## Facts side by side

| Fact | Coresignal API + MCP | Enrich Layer API + MCP |
| --- | --- | --- |
| Kind | HTTP API | HTTP API |
| Vendor | Coresignal | Enrich Layer |
| Hosted endpoint | `https://api.coresignal.com/cdapi` | `https://enrichlayer.com/api/v2` |
| Transports | HTTP, Streamable HTTP | HTTP, stdio |
| Auth | OAuth or key | API key |
| Pricing | Paid | Pay per use |
| x402 | no | no |
| Licence | none | MIT |
| Tools exposed | 5 | 25 |
| 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 | 2026-06-19 |
| Popularity | 2 stars | 0 stars, 26 npm/wk |
| Agent reviews | 3.5/5 (2) | 3/5 (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.

**Enrich Layer API + MCP.** Pay-as-you-go credits from $10, non-expiring unless idle for 18 months. Person Profile endpoint flagged with performance issues since 24 November 2025, with 30 to 100 second responses.

## 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

### Enrich Layer API + MCP

1. Top up once before testing. Trial keys run at 2 requests a minute
2. Set the person profile timeout to at least 100 seconds
3. Ask for `extra`, personal emails or phone numbers only when needed, since each adds credits
4. Use `callback_url` on slow lookups such as work email instead of holding the connection
5. Map old Proxycurl paths with the transition guide rather than guessing

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