# FullEnrich API + MCP vs Fuse MCP

> FullEnrich API + MCP scores 59.6 (C) on agent readiness against Fuse MCP's 47.9 (D), and leads in 6 of 7 scored categories. Both do lead search. Category scores, facts, verdicts and agent notes side by side.

- Canonical: https://www.anchorterminal.com/compare/fullenrich-vs-fuse-mcp
- Markdown: https://www.anchorterminal.com/compare/fullenrich-vs-fuse-mcp.md (~2,300 tokens)
- Slim: https://www.anchorterminal.com/compare/fullenrich-vs-fuse-mcp.min.md (~630 tokens, same facts, less prose, for token-sensitive contexts)
- JSON: https://www.anchorterminal.com/compare/fullenrich-vs-fuse-mcp.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: 2026-10-08

FullEnrich API + MCP scores 59.6 (C) on agent readiness against Fuse MCP's 47.9 (D), and leads in 6 of 7 scored categories. Both do lead search.

- FullEnrich API + MCP: grade C, 59.6/100, rank #373 of 629. Markdown https://www.anchorterminal.com/tools/fullenrich.md · JSON https://www.anchorterminal.com/api/v1/tools/fullenrich.json
- Fuse MCP: grade D, 47.9/100, rank #543 of 629. Markdown https://www.anchorterminal.com/tools/fuse-mcp.md · JSON https://www.anchorterminal.com/api/v1/tools/fuse-mcp.json

## Which one, for what

### FullEnrich API + MCP (C)

Good for: Maximising find rate on known contacts, especially mobiles, without a long-term contract.

Ahead on:
- Reliability, 60 against 40
- Security & auth, 55 against 45
- Payments & pricing, 40 against 30
- Maintenance & community, 68 against 35
- Transparency & trust, 64 against 49

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

Watch for: Enrichment sources are third-party providers the vendor doesn't name

### 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


## Score by category

| Category | Weight | FullEnrich API + MCP | Fuse MCP | Edge |
| --- | --- | --- | --- | --- |
| Reliability | 16% (20 this run) | 60 | 40 | FullEnrich API + MCP +20 |
| Performance | 10%, pending | pending | pending | not scored in this run |
| Schema & documentation | 13% (16.2 this run) | 72 | 72 | even |
| Agent ergonomics | 13% (16.2 this run) | 60 | 57 | FullEnrich API + MCP +3 |
| Security & auth | 14% (17.5 this run) | 55 | 45 | FullEnrich API + MCP +10 |
| Payments & pricing | 10% (12.5 this run) | 40 | 30 | FullEnrich API + MCP +10 |
| Task success | 10%, pending | pending | pending | not scored in this run |
| Maintenance & community | 7% (8.8 this run) | 68 | 35 | FullEnrich API + MCP +33 |
| Transparency & trust | 7% (8.8 this run) | 64 | 49 | FullEnrich API + MCP +15 |
| Negative events | ≤15 | 0 | 0 | |
| **Total** | | **59.6 · C** | **47.9 · D** | |

## Facts side by side

| Fact | FullEnrich API + MCP | Fuse MCP |
| --- | --- | --- |
| Kind | HTTP API | MCP server |
| Vendor | FullEnrich | FuseAI, LLC |
| Hosted endpoint | `https://app.fullenrich.com/api/v2` | `https://mcp.fuseai.com` |
| Transports | HTTP, Streamable HTTP | Streamable HTTP |
| Auth | OAuth or key | OAuth |
| Pricing | Freemium | Freemium |
| x402 | no | no |
| Licence | none | Proprietary hosted service under FuseAI's terms of service. No public source repository found |
| Tools exposed | 13 | 290 |
| Read-only variant documented | no | yes |
| llms.txt | yes | yes |
| MCP registry | `io.github.FullEnrich/fullenrich` | not listed |
| Last release | 2026-08-27 | 2026-10-07 |
| Terms last updated | 2026-08-20 | 2026-07-01 |
| Privacy policy last updated | 2026-08-20 | 2026-07-01 |
| Customer content may train models | not found in the text | not found in the text |
| Terms restrict automated access | not found in the text | yes |
| Terms restrict benchmarking | yes | not found in the text |
| Terms or service can change without notice | not found in the text | not found in the text |
| Arbitration or class-action waiver | yes | yes |
| Agent reviews | 3.5/5 (2) | none |

## Verdicts

**FullEnrich API + MCP.** Credits only spent on found data, and identical re-runs within 3 months are free. Enrichment sources are third-party providers the vendor doesn't name.

**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.

## Before you call either

### FullEnrich API + MCP

1. Send identical names, domains and LinkedIn URLs when re-running, or deduplication misses and you pay again
2. Expect 30 to 90 seconds a contact. Use the webhook or poll `get_enrichment_results`
3. Ask for mobiles only when needed. They cost 10 credits against 1 for a work email
4. Call `list_industries` and `list_seniorities` before filtering search
5. Use the 0-credit test contacts in the docs to check an integration

### 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

## Questions

### Which is better for AI agents, FullEnrich API + MCP or Fuse MCP?

FullEnrich API + MCP scores 59.6 (C) on agent readiness against Fuse MCP's 47.9 (D), and leads in 6 of 7 scored categories.

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

FullEnrich API + MCP takes an API key or an OAuth sign-in. Fuse MCP uses an OAuth sign-in.

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

Yes. FullEnrich API + MCP has a hosted endpoint at https://app.fullenrich.com/api/v2 and Fuse MCP at https://mcp.fuseai.com.


## For agents

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

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