# Coresignal API + MCP vs Crustdata API + MCP

> Coresignal API + MCP has a score of 63.1 (B) against Crustdata API + MCP's 53.5 (D). Both do lead search. The largest gap is transparency & trust, 17 points. Category scores, facts, verdicts and agent notes side by side.

- Canonical: https://www.anchorterminal.com/compare/coresignal-vs-crustdata
- Markdown: https://www.anchorterminal.com/compare/coresignal-vs-crustdata.md (~1,600 tokens)
- Slim: https://www.anchorterminal.com/compare/coresignal-vs-crustdata.min.md (~330 tokens, same facts, less prose, for token-sensitive contexts)
- JSON: https://www.anchorterminal.com/compare/coresignal-vs-crustdata.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: 2026-10-05

Coresignal API + MCP has a score of 63.1 (B) against Crustdata API + MCP's 53.5 (D). Both do lead search. The largest gap is transparency & trust, 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
- Crustdata API + MCP: grade D, 53.5/100, rank #331 of 452. Markdown https://www.anchorterminal.com/tools/crustdata.md · JSON https://www.anchorterminal.com/api/v1/tools/crustdata.json

## Which one, for what

Pick Coresignal API + MCP for reliability (+10), payments & pricing (+15), maintenance & community (+15), transparency & trust (+17).

Pick Crustdata API + MCP for nothing in particular (no category where it leads by five points or more).

## Score by category

| Category | Weight | Coresignal API + MCP | Crustdata API + MCP | Edge |
| --- | --- | --- | --- | --- |
| Reliability | 16% (20 this run) | 55 | 45 | Coresignal API + MCP +10 |
| Performance | 10%, pending | pending | pending | not scored in this run |
| Schema & documentation | 13% (16.2 this run) | 86 | 89 | Crustdata API + MCP +3 |
| Agent ergonomics | 13% (16.2 this run) | 73 | 73 | even |
| Security & auth | 14% (17.5 this run) | 58 | 56 | Coresignal API + MCP +2 |
| Payments & pricing | 10% (12.5 this run) | 20 | 5 | Coresignal API + MCP +15 |
| Task success | 10%, pending | pending | pending | not scored in this run |
| Maintenance & community | 7% (8.8 this run) | 82 | 67 | Coresignal API + MCP +15 |
| Transparency & trust | 7% (8.8 this run) | 73 | 56 | Coresignal API + MCP +17 |
| Negative events | ≤15 | 0 | -3 | |
| **Total** | | **63.1 · B** | **53.5 · D** | |

## Facts side by side

| Fact | Coresignal API + MCP | Crustdata API + MCP |
| --- | --- | --- |
| Kind | HTTP API | HTTP API |
| Vendor | Coresignal | Crustdata |
| Hosted endpoint | `https://api.coresignal.com/cdapi` | `https://api.crustdata.com` |
| Transports | HTTP, Streamable HTTP | HTTP, Streamable HTTP |
| Auth | OAuth or key | OAuth or key |
| Pricing | Paid | Pay per use |
| x402 | no | no |
| Licence | none | none |
| Tools exposed | 5 | none |
| 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 | none |
| Popularity | 2 stars | none |
| Agent reviews | 3.5/5 (2) | 2.5/5 (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.

**Crustdata API + MCP.** Per-field credit prices, readable per account from `/account/endpoints`, and `X-Credits-Used` on every response. No status page and no SLA.

## 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

### Crustdata API + MCP

1. Always send `x-api-version: 2025-11-01`. Unpinned calls get the latest version
2. Call `/account/endpoints` first to see what your plan enables and what each field costs
3. Ask only for the premium field groups you need, since each one bills
4. Poll `GET /batch/{id}` before submitting more batch jobs. Active jobs count against a cap of 5 to 30
5. Read the `crustdata://catalog` resource before calling MCP tools

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