# Clearbit vs Fuse MCP

> Fuse MCP scores 47.9 (D) to Clearbit's 13.5 (F) for lead enrichment. Prices, MCP, x402, uptime and agent notes side by side.

- Canonical: https://www.anchorterminal.com/compare/clearbit-vs-fuse-mcp
- Markdown: https://www.anchorterminal.com/compare/clearbit-vs-fuse-mcp.md (~2,600 tokens)
- Slim: https://www.anchorterminal.com/compare/clearbit-vs-fuse-mcp.min.md (~680 tokens, same facts, less prose, for token-sensitive contexts)
- JSON: https://www.anchorterminal.com/compare/clearbit-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: 2026-10-14

Fuse MCP scores 47.9 (D) on agent readiness against Clearbit's 13.5 (F), and leads in 6 of 7 scored categories. Clearbit leads on transparency & trust. Both do lead enrichment.

- Clearbit: grade F, 13.5/100, rank #1056 of 1076. Markdown https://www.anchorterminal.com/tools/clearbit.md · JSON https://www.anchorterminal.com/api/v1/tools/clearbit.json
- Fuse MCP: grade D, 47.9/100, rank #883 of 1076. Markdown https://www.anchorterminal.com/tools/fuse-mcp.md · JSON https://www.anchorterminal.com/api/v1/tools/fuse-mcp.json
- Best lead, contact and company data APIs for AI agents: https://www.anchorterminal.com/best/lead-data/index.md
- All 171 leads comparisons: https://www.anchorterminal.com/compare/lead-data/index.md

## Which one, for what

### Clearbit (F)

Good for: Only for teams that already hold a Clearbit contract.

Ahead on:
- Transparency & trust, 66 against 49

Watch for: No public API or MCP server an outside agent can call

### 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.

Ahead on:
- Reliability, 40 against 30
- Schema & documentation, 72 against 0
- Agent ergonomics, 57 against 0
- Security & auth, 45 against 8
- Payments & pricing, 30 against 0
- Maintenance & community, 35 against 4

Also in its favour:
- A hosted endpoint, with nothing to install

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 | Clearbit | Fuse MCP | Edge |
| --- | --- | --- | --- | --- |
| Reliability | 16% (20 this run) | 30 | 40 | Fuse MCP +10 |
| Performance | 10%, pending | pending | pending | not scored in this run |
| Schema & documentation | 13% (16.2 this run) | 0 | 72 | Fuse MCP +72 |
| Agent ergonomics | 13% (16.2 this run) | 0 | 57 | Fuse MCP +57 |
| Security & auth | 14% (17.5 this run) | 8 | 45 | Fuse MCP +37 |
| Payments & pricing | 10% (12.5 this run) | 0 | 30 | Fuse MCP +30 |
| Task success | 10%, pending | pending | pending | not scored in this run |
| Maintenance & community | 7% (8.8 this run) | 4 | 35 | Fuse MCP +31 |
| Transparency & trust | 7% (8.8 this run) | 66 | 49 | Clearbit +17 |
| Negative events | ≤15 | 0 | 0 | |
| **Total** | | **13.5 · F** | **47.9 · D** | |

## Facts side by side

| Fact | Clearbit | Fuse MCP |
| --- | --- | --- |
| Kind | HTTP API | MCP server |
| Vendor | HubSpot, Inc. | FuseAI, LLC |
| Hosted endpoint | no (local only) | `https://mcp.fuseai.com` |
| Transports | HTTP | Streamable HTTP |
| Auth | API key | OAuth |
| Pricing | Paid | Freemium |
| x402 | no | no |
| Licence | Proprietary service under the Clearbit Terms of Service (30 May 2025), provided by HubSpot, Inc. under the Clearbit brand | Proprietary hosted service under FuseAI's terms of service. No public source repository found |
| Tools exposed | none | 290 |
| Read-only variant documented | no | yes |
| llms.txt | no | yes |
| Last release | 2025-12-08 | 2026-10-07 |
| Terms last updated | 2025-05-30 | 2026-07-01 |
| Privacy policy last updated | 2026-08-31 | 2026-07-01 |
| Customer content may train models | yes | not found in the text |
| Terms restrict automated access | not found in the text | yes |
| Terms restrict benchmarking | not found in the text | 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 | not found in the text | yes |

## Verdicts

**Clearbit.** There is no public API or MCP server an outside agent can call today. Clearbit's APIs still run for existing customers behind a login, and its free tools and Logo API were retired in 2025. HubSpot's Breeze Intelligence is the route for new buyers, through HubSpot rather than Clearbit.

**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

### Clearbit

1. Don't plan to call Clearbit. Hand the task to a person with an existing Clearbit account, or use HubSpot's Breeze Intelligence through HubSpot
2. Replace logo.clearbit.com links, which stopped working after 8 December 2025

### 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, Clearbit or Fuse MCP?

Fuse MCP scores 47.9 (D) on agent readiness against Clearbit's 13.5 (F), and leads in 6 of 7 scored categories. Clearbit leads on transparency & trust.

### Do Clearbit and Fuse MCP need an API key?

Clearbit needs an API key. Fuse MCP uses an OAuth sign-in.

### Can an agent call Clearbit and Fuse MCP without installing anything?

No hosted endpoint is listed for Clearbit. Fuse MCP has a hosted endpoint at https://mcp.fuseai.com.


## For agents

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

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