# Dropcontact API + MCP vs ZoomInfo API + MCP

> ZoomInfo API + MCP scores 72.2 (BB) on agent readiness against Dropcontact API + MCP's 50.9 (D), and leads in 6 of 7 scored categories. Both do lead enrichment. Category scores, facts, verdicts and agent notes side by side.

- Canonical: https://www.anchorterminal.com/compare/dropcontact-vs-zoominfo
- Markdown: https://www.anchorterminal.com/compare/dropcontact-vs-zoominfo.md (~2,450 tokens)
- Slim: https://www.anchorterminal.com/compare/dropcontact-vs-zoominfo.min.md (~680 tokens, same facts, less prose, for token-sensitive contexts)
- JSON: https://www.anchorterminal.com/compare/dropcontact-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 Dropcontact API + MCP's 50.9 (D), and leads in 6 of 7 scored categories. Both do lead enrichment.

- Dropcontact API + MCP: grade D, 50.9/100, rank #679 of 842. Markdown https://www.anchorterminal.com/tools/dropcontact.md · JSON https://www.anchorterminal.com/api/v1/tools/dropcontact.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

### Dropcontact API + MCP (D)

Good for: European teams cleaning and completing contact lists where GDPR handling matters more than coverage.

Also in its favour:
- Free to start without a card

Watch for: No OpenAPI spec, llms.txt or changelog

### 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 57
- Schema & documentation, 84 against 41
- Agent ergonomics, 71 against 60
- Security & auth, 65 against 59
- Maintenance & community, 76 against 18

Also in its favour:
- Agent-ready, a grade of BB or better

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 | Dropcontact API + MCP | ZoomInfo API + MCP | Edge |
| --- | --- | --- | --- | --- |
| Reliability | 16% (20 this run) | 57 | 87 | ZoomInfo API + MCP +30 |
| Performance | 10%, pending | pending | pending | not scored in this run |
| Schema & documentation | 13% (16.2 this run) | 41 | 84 | ZoomInfo API + MCP +43 |
| Agent ergonomics | 13% (16.2 this run) | 60 | 71 | ZoomInfo API + MCP +11 |
| Security & auth | 14% (17.5 this run) | 59 | 65 | ZoomInfo API + MCP +6 |
| Payments & pricing | 10% (12.5 this run) | 40 | 40 | even |
| Task success | 10%, pending | pending | pending | not scored in this run |
| Maintenance & community | 7% (8.8 this run) | 18 | 76 | ZoomInfo API + MCP +58 |
| Transparency & trust | 7% (8.8 this run) | 71 | 75 | ZoomInfo API + MCP +4 |
| Negative events | ≤15 | 0 | 0 | |
| **Total** | | **50.9 · D** | **72.2 · BB** | |

## Facts side by side

| Fact | Dropcontact API + MCP | ZoomInfo API + MCP |
| --- | --- | --- |
| Kind | HTTP API | HTTP API |
| Vendor | Dropcontact | ZoomInfo Technologies LLC |
| Hosted endpoint | `https://api.dropcontact.com/v1` | `https://api.zoominfo.com/gtm` |
| Transports | HTTP, Streamable HTTP | HTTP, Streamable HTTP |
| Auth | OAuth or key | OAuth |
| Pricing | Paid | 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 | no | yes |
| Last release | none | 2026-10-02 |
| Terms last updated | 2025-08-01 | no date given |
| Privacy policy last updated | 2020-06-04 | 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 | 3.5/5 (2) | none |

## Verdicts

**Dropcontact API + MCP.** Pay on success, with credits refunded when no email is found. No OpenAPI spec, llms.txt or changelog.

**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

### Dropcontact API + MCP

1. Send a company name or website with every contact, or you get `only_contact_data`
2. Send only documented fields. New accounts get a 400 for unknown ones
3. Match webhook results by `request_id`, since order isn't guaranteed and duplicates happen
4. Poll no faster than every 30 seconds, as the not-ready response asks
5. Post an empty contact to read the credit balance at no cost

### 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, Dropcontact API + MCP or ZoomInfo API + MCP?

ZoomInfo API + MCP scores 72.2 (BB) on agent readiness against Dropcontact API + MCP's 50.9 (D), and leads in 6 of 7 scored categories.

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

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

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

Yes. Dropcontact API + MCP has a hosted endpoint at https://api.dropcontact.com/v1 and ZoomInfo API + MCP at https://api.zoominfo.com/gtm.


## For agents

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

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