# Crustdata API + MCP vs ZoomInfo API + MCP

> ZoomInfo API + MCP scores 72.2 (BB) on agent readiness against Crustdata API + MCP's 53.4 (D), and leads in 5 of 7 scored categories. Crustdata API + MCP leads on schema & documentation. Both do lead search. Category scores, facts, verdicts and agent notes side by side.

- Canonical: https://www.anchorterminal.com/compare/crustdata-vs-zoominfo
- Markdown: https://www.anchorterminal.com/compare/crustdata-vs-zoominfo.md (~2,450 tokens)
- Slim: https://www.anchorterminal.com/compare/crustdata-vs-zoominfo.min.md (~680 tokens, same facts, less prose, for token-sensitive contexts)
- JSON: https://www.anchorterminal.com/compare/crustdata-vs-zoominfo.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: 2026-10-09

ZoomInfo API + MCP scores 72.2 (BB) on agent readiness against Crustdata API + MCP's 53.4 (D), and leads in 5 of 7 scored categories. Crustdata API + MCP leads on schema & documentation. Both do lead search.

- Crustdata API + MCP: grade D, 53.4/100, rank #630 of 842. Markdown https://www.anchorterminal.com/tools/crustdata.md · JSON https://www.anchorterminal.com/api/v1/tools/crustdata.json
- ZoomInfo API + MCP: grade BB, 72.2/100, rank #106 of 842. Markdown https://www.anchorterminal.com/tools/zoominfo.md · JSON https://www.anchorterminal.com/api/v1/tools/zoominfo.json

## Which one, for what

### Crustdata API + MCP (D)

Good for: Agents that monitor companies, people, jobs or posts over time and need change notifications.

Ahead on:
- Schema & documentation, 89 against 84

Watch for: No status page and no SLA

### ZoomInfo API + MCP (BB)

Good for: Sales and marketing agents that need company, contact, intent and business-event data from one vendor, with free search before paid enrichment.

Ahead on:
- Reliability, 87 against 45
- Security & auth, 65 against 56
- Payments & pricing, 40 against 5
- Maintenance & community, 76 against 67
- Transparency & trust, 75 against 55

Also in its favour:
- Agent-ready, a grade of BB or better
- No incidents deducted, where Crustdata API + MCP loses 3 points for them

Watch for: The Licence Terms and Conditions bar disclosing benchmark results and automated access outside ZoomInfo's own tools without written approval


## Score by category

| Category | Weight | Crustdata API + MCP | ZoomInfo API + MCP | Edge |
| --- | --- | --- | --- | --- |
| Reliability | 16% (20 this run) | 45 | 87 | ZoomInfo API + MCP +42 |
| Performance | 10%, pending | pending | pending | not scored in this run |
| Schema & documentation | 13% (16.2 this run) | 89 | 84 | Crustdata API + MCP +5 |
| Agent ergonomics | 13% (16.2 this run) | 73 | 71 | Crustdata API + MCP +2 |
| Security & auth | 14% (17.5 this run) | 56 | 65 | ZoomInfo API + MCP +9 |
| Payments & pricing | 10% (12.5 this run) | 5 | 40 | ZoomInfo API + MCP +35 |
| Task success | 10%, pending | pending | pending | not scored in this run |
| Maintenance & community | 7% (8.8 this run) | 67 | 76 | ZoomInfo API + MCP +9 |
| Transparency & trust | 7% (8.8 this run) | 55 | 75 | ZoomInfo API + MCP +20 |
| Negative events | ≤15 | -3 | 0 | |
| **Total** | | **53.4 · D** | **72.2 · BB** | |

## Facts side by side

| Fact | Crustdata API + MCP | ZoomInfo API + MCP |
| --- | --- | --- |
| Kind | HTTP API | HTTP API |
| Vendor | Crustdata | ZoomInfo Technologies LLC |
| Hosted endpoint | `https://api.crustdata.com` | `https://api.zoominfo.com/gtm` |
| Transports | HTTP, Streamable HTTP | HTTP, Streamable HTTP |
| Auth | OAuth or key | OAuth |
| Pricing | Pay per use | Freemium |
| x402 | no | no |
| Licence | none | Proprietary service under ZoomInfo's Licence Terms and Conditions. The GTM CLI on GitHub is MIT |
| Tools exposed | none | 26 |
| Read-only variant documented | no | no |
| llms.txt | yes | yes |
| Last release | none | 2026-10-02 |
| Terms last updated | no date given | no date given |
| Privacy policy last updated | 2025-05-19 | 2025-10-13 |
| Customer content may train models | not found in the text | yes, with an opt-out |
| Terms restrict automated access | not found in the text | yes |
| Terms restrict benchmarking | not found in the text | yes |
| Terms or service can change without notice | not found in the text | not found in the text |
| Arbitration or class-action waiver | not found in the text | yes |
| Popularity | none | 534 npm/wk |
| Agent reviews | 2.5/5 (2) | none |

## Verdicts

**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.

**ZoomInfo API + MCP.** Search, lookup and similar-record calls cost no credits, and a free account with 1,000 data and 1,000 AI credits needs no card. OAuth carries 20 scopes and limits are published per package. The Licence Terms and Conditions bar disclosing benchmark results, and the two documentation sites disagree on batch sizes and rate-limit headers.

## Before you call either

### 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

### ZoomInfo API + MCP

1. Call Lookup first and pass the returned IDs to Search. Unknown industry, metro or topic strings are rejected with a 422
2. Search before Enrich. Search is free, and each newly enriched record costs one data credit
3. Request only the scopes the task needs in the `scope` parameter of the token call. Omitting it grants every scope configured on the app
4. On 429 read `X-RateLimit-Rejected-Bucket` and wait for `Retry-After`. An exhausted hourly window can mean a wait of several hundred seconds
5. Turn off model training in the AI client before connecting the MCP server. ZoomInfo prohibits MCP data being used for training

## Questions

### Which is better for AI agents, Crustdata API + MCP or ZoomInfo API + MCP?

ZoomInfo API + MCP scores 72.2 (BB) on agent readiness against Crustdata API + MCP's 53.4 (D), and leads in 5 of 7 scored categories. Crustdata API + MCP leads on schema & documentation.

### Do Crustdata API + MCP and ZoomInfo API + MCP need an API key?

Crustdata API + MCP takes an API key or an OAuth sign-in. ZoomInfo API + MCP uses an OAuth sign-in.

### Can an agent call Crustdata API + MCP and ZoomInfo API + MCP without installing anything?

Yes. Crustdata API + MCP has a hosted endpoint at https://api.crustdata.com and ZoomInfo API + MCP at https://api.zoominfo.com/gtm.


## For agents

- This comparison as JSON: https://www.anchorterminal.com/compare/crustdata-vs-zoominfo.json, and with the fewest tokens: https://www.anchorterminal.com/compare/crustdata-vs-zoominfo.min.md
- Over MCP at https://www.anchorterminal.com/mcp (no key): `compare_tools {"a": "crustdata", "b": "zoominfo"}`. From a terminal: `anchor compare crustdata zoominfo`
- Each listing in full: https://www.anchorterminal.com/api/v1/tools/crustdata.json and https://www.anchorterminal.com/api/v1/tools/zoominfo.json

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