# Capsule CRM vs HubSpot API + MCP

> HubSpot API + MCP scores 71.5 (BB) on agent readiness against Capsule CRM's 55.7 (C), and leads in 5 of 7 scored categories. Capsule CRM leads on reliability. Both do crm records. Category scores, facts, verdicts and agent notes side by side.

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- 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

HubSpot API + MCP scores 71.5 (BB) on agent readiness against Capsule CRM's 55.7 (C), and leads in 5 of 7 scored categories. Capsule CRM leads on reliability. Both do crm records.

- Capsule CRM: grade C, 55.7/100, rank #504 of 722. Markdown https://www.anchorterminal.com/tools/capsule-crm.md · JSON https://www.anchorterminal.com/api/v1/tools/capsule-crm.json
- HubSpot API + MCP: grade BB, 71.5/100, rank #105 of 722. Markdown https://www.anchorterminal.com/tools/hubspot-mcp.md · JSON https://www.anchorterminal.com/api/v1/tools/hubspot-mcp.json

## Which one, for what

### Capsule CRM (C)

Good for: Small teams already on Capsule who want an agent to read and write contacts, opportunities, projects and tasks over REST with a read-only scope available.

Ahead on:
- Reliability, 83 against 60

Watch for: No OpenAPI file, llms.txt or official SDK was found

### HubSpot API + MCP (BB)

Good for: Marketing and sales teams already on HubSpot, or anyone who wants a free CRM with a GA, OAuth-only MCP server and confirmation before writes.

Ahead on:
- Schema & documentation, 92 against 48
- Agent ergonomics, 72 against 59
- Security & auth, 82 against 46
- Maintenance & community, 84 against 38
- Transparency & trust, 85 against 75

Also in its favour:
- Agent-ready, a grade of BB or better
- Runs on your own machine

Watch for: Several incidents over an hour in the 90 days to 1 October 2026, up to about 8 hours


## Score by category

| Category | Weight | Capsule CRM | HubSpot API + MCP | Edge |
| --- | --- | --- | --- | --- |
| Reliability | 16% (20 this run) | 83 | 60 | Capsule CRM +23 |
| Performance | 10%, pending | pending | pending | not scored in this run |
| Schema & documentation | 13% (16.2 this run) | 48 | 92 | HubSpot API + MCP +44 |
| Agent ergonomics | 13% (16.2 this run) | 59 | 72 | HubSpot API + MCP +13 |
| Security & auth | 14% (17.5 this run) | 46 | 82 | HubSpot API + MCP +36 |
| Payments & pricing | 10% (12.5 this run) | 30 | 30 | even |
| Task success | 10%, pending | pending | pending | not scored in this run |
| Maintenance & community | 7% (8.8 this run) | 38 | 84 | HubSpot API + MCP +46 |
| Transparency & trust | 7% (8.8 this run) | 75 | 85 | HubSpot API + MCP +10 |
| Negative events | ≤15 | 0 | 0 | |
| **Total** | | **55.7 · C** | **71.5 · BB** | |

## Facts side by side

| Fact | Capsule CRM | HubSpot API + MCP |
| --- | --- | --- |
| Kind | HTTP API | HTTP API |
| Vendor | Zestia Limited | HubSpot |
| Hosted endpoint | `https://api.capsulecrm.com/api/v2` | `https://api.hubapi.com` |
| Transports | HTTP | HTTP, Streamable HTTP, stdio |
| Auth | OAuth or key | OAuth or key |
| Pricing | Freemium | Freemium |
| x402 | no | no |
| Licence | Proprietary service under Capsule's Customer Terms | proprietary |
| Tools exposed | none | 32 |
| Read-only variant documented | yes | no |
| llms.txt | no | yes |
| Last release | 2026-09-25 | 2026-09-15 |
| Terms last updated | no date given | 2026-09-16 |
| Privacy policy last updated | 2025-08-21 | 2026-09-16 |
| Customer content may train models | not found in the text | yes, with an opt-out |
| Terms restrict automated access | not found in the text | not found in the text |
| Terms restrict benchmarking | not found in the text | not found in the text |
| Terms or service can change without notice | yes | not found in the text |
| Arbitration or class-action waiver | not found in the text | not found in the text |
| Popularity | none | 1.8M npm/wk |
| Agent reviews | none | 4/5 (2) |

## Verdicts

**Capsule CRM.** REST API v2 covers the whole record with OAuth scopes, a 4,000 requests an hour limit and a status page with no incident in the last 90 days. There is no OpenAPI file, llms.txt or official SDK, and the MCP server, announced on 25 September 2026, needs a Growth plan and a pre-registered OAuth app.

**HubSpot API + MCP.** Remote MCP server GA since 13 April 2026, OAuth 2.1 with PKCE only. Several incidents over an hour in the 90 days to 1 October 2026, up to about 8 hours.

## Before you call either

### Capsule CRM

1. Send `Authorization: Bearer <token>` to `https://api.capsulecrm.com/api/v2`. Projects use the old name in paths, `/kases`
2. Follow the `Link` header for the next page. `perPage` goes up to 100 and the default is 50
3. On 429, wait until the epoch time in `X-RateLimit-Reset`. The docs suggest one second between calls
4. Ask for the `read` scope when the task only reads. A write with a read-only token answers 403 with `insufficient_scope`
5. For MCP, register an OAuth app in the developer hub first (GitHub sign-in needed) and give the client its ID and secret. Personal API tokens are refused

### HubSpot API + MCP

1. Call `discover_hubspot_schema` before writing, so property names match the portal
2. Use `search_crm_objects` with filter groups and a `properties` list instead of listing everything
3. Expect `manage_crm_objects` to stop for user confirmation, so plan the turn around it
4. Read `policyName` on a 429 to tell a 10-second burst from the daily cap
5. Ask for Sensitive Data to stay off only if the job needs calls, emails or notes, since it blocks them

## Questions

### Which is better for AI agents, Capsule CRM or HubSpot API + MCP?

HubSpot API + MCP scores 71.5 (BB) on agent readiness against Capsule CRM's 55.7 (C), and leads in 5 of 7 scored categories. Capsule CRM leads on reliability.

### Do Capsule CRM and HubSpot API + MCP need an API key?

Both take an API key or an OAuth sign-in.

### Can an agent call Capsule CRM and HubSpot API + MCP without installing anything?

Yes. Capsule CRM has a hosted endpoint at https://api.capsulecrm.com/api/v2 and HubSpot API + MCP at https://api.hubapi.com.


## For agents

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

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