# Fuse MCP vs ZoomInfo API + MCP

> ZoomInfo API + MCP scores 72.2 (BB) on agent readiness against Fuse MCP's 47.9 (D), and leads in every scored category. Both do lead search. Category scores, facts, verdicts and agent notes side by side.

- Canonical: https://www.anchorterminal.com/compare/fuse-mcp-vs-zoominfo
- Markdown: https://www.anchorterminal.com/compare/fuse-mcp-vs-zoominfo.md (~2,500 tokens)
- Slim: https://www.anchorterminal.com/compare/fuse-mcp-vs-zoominfo.min.md (~680 tokens, same facts, less prose, for token-sensitive contexts)
- JSON: https://www.anchorterminal.com/compare/fuse-mcp-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 Fuse MCP's 47.9 (D), and leads in every scored category. Both do lead search.

- Fuse MCP: grade D, 47.9/100, rank #732 of 842. Markdown https://www.anchorterminal.com/tools/fuse-mcp.md · JSON https://www.anchorterminal.com/api/v1/tools/fuse-mcp.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

### Fuse MCP (D)

Good for: Suited to a salesperson or founder who wants an assistant to build prospect lists, enrich them and run email and LinkedIn outreach inside one Fuse account.

Watch for: The only OAuth scope is `mcp:tools`, so a connection can do everything its user can, including sending email and LinkedIn messages

### 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 40
- Schema & documentation, 84 against 72
- Agent ergonomics, 71 against 57
- Security & auth, 65 against 45
- Payments & pricing, 40 against 30
- Maintenance & community, 76 against 35
- Transparency & trust, 75 against 49

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 | Fuse MCP | ZoomInfo API + MCP | Edge |
| --- | --- | --- | --- | --- |
| Reliability | 16% (20 this run) | 40 | 87 | ZoomInfo API + MCP +47 |
| Performance | 10%, pending | pending | pending | not scored in this run |
| Schema & documentation | 13% (16.2 this run) | 72 | 84 | ZoomInfo API + MCP +12 |
| Agent ergonomics | 13% (16.2 this run) | 57 | 71 | ZoomInfo API + MCP +14 |
| Security & auth | 14% (17.5 this run) | 45 | 65 | ZoomInfo API + MCP +20 |
| Payments & pricing | 10% (12.5 this run) | 30 | 40 | ZoomInfo API + MCP +10 |
| Task success | 10%, pending | pending | pending | not scored in this run |
| Maintenance & community | 7% (8.8 this run) | 35 | 76 | ZoomInfo API + MCP +41 |
| Transparency & trust | 7% (8.8 this run) | 49 | 75 | ZoomInfo API + MCP +26 |
| Negative events | ≤15 | 0 | 0 | |
| **Total** | | **47.9 · D** | **72.2 · BB** | |

## Facts side by side

| Fact | Fuse MCP | ZoomInfo API + MCP |
| --- | --- | --- |
| Kind | MCP server | HTTP API |
| Vendor | FuseAI, LLC | ZoomInfo Technologies LLC |
| Hosted endpoint | `https://mcp.fuseai.com` | `https://api.zoominfo.com/gtm` |
| Transports | Streamable HTTP | HTTP, Streamable HTTP |
| Auth | OAuth | OAuth |
| Pricing | Freemium | Freemium |
| x402 | no | no |
| Licence | Proprietary hosted service under FuseAI's terms of service. No public source repository found | Proprietary service under ZoomInfo's Licence Terms and Conditions. The GTM CLI on GitHub is MIT |
| Tools exposed | 290 | 26 |
| Read-only variant documented | yes | no |
| llms.txt | yes | yes |
| Last release | 2026-10-07 | 2026-10-02 |
| Terms last updated | 2026-07-01 | no date given |
| Privacy policy last updated | 2026-07-01 | 2025-10-13 |
| Customer content may train models | not found in the text | yes, with an opt-out |
| Terms restrict automated access | yes | 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 | yes | yes |
| Popularity | none | 534 npm/wk |

## Verdicts

**Fuse MCP.** The server documents 290 tools with read-only and destructive annotations, OAuth with PKCE and dynamic client registration, and published limits of 60 requests a minute. The single `mcp:tools` scope grants everything the user can do, sends happen at once with no undo, and no status page, changelog or security contact was found.

**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

### Fuse MCP

1. Keep the client's approval prompt on for every tool that is not read-only. Sends, CRM pushes and Slack posts run at once with no undo
2. Launch a campaign only on an explicit request. Creating one makes a draft, and `update_campaign_status_tool` starts real outreach
3. Call `get_credits_balance` and `get_credit_prices` first. Every call needs at least 100 credits, and searches cost 2 credits a result
4. Resolve filter values with `lookup_filter_values` or `get_company_search_enums` before `search_people` or `search_companies`
5. Start long work with `deep_research_start`, then poll `deep_research_status`. A tool call has 60 seconds, and runs take 5 to 20 minutes

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

ZoomInfo API + MCP scores 72.2 (BB) on agent readiness against Fuse MCP's 47.9 (D), and leads in every scored category.

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

Both use an OAuth sign-in.

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

Yes. Fuse MCP has a hosted endpoint at https://mcp.fuseai.com and ZoomInfo API + MCP at https://api.zoominfo.com/gtm.


## For agents

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

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