# Gumloop vs Prismatic

> Gumloop scores 61.6 (C) to Prismatic's 59.1 (C) for workflow automation. Prices, MCP, x402, uptime and agent notes side by side.

- Canonical: https://www.anchorterminal.com/compare/gumloop-vs-prismatic
- Markdown: https://www.anchorterminal.com/compare/gumloop-vs-prismatic.md (~2,400 tokens)
- Slim: https://www.anchorterminal.com/compare/gumloop-vs-prismatic.min.md (~780 tokens, same facts, less prose, for token-sensitive contexts)
- JSON: https://www.anchorterminal.com/compare/gumloop-vs-prismatic.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

Gumloop scores 61.6 (C) on agent readiness against Prismatic's 59.1 (C), and leads in 4 of 7 scored categories. Prismatic leads on security & auth, maintenance & community and transparency & trust. Both do workflow automation.

- Gumloop: grade C, 61.6/100, rank #463 of 950. Markdown https://www.anchorterminal.com/tools/gumloop.md · JSON https://www.anchorterminal.com/api/v1/tools/gumloop.json
- Prismatic: grade C, 59.1/100, rank #561 of 950. Markdown https://www.anchorterminal.com/tools/prismatic.md · JSON https://www.anchorterminal.com/api/v1/tools/prismatic.json
- Best workflow automation platforms with APIs for AI agents: https://www.anchorterminal.com/best/workflow-automation/index.md
- All 108 workflows comparisons: https://www.anchorterminal.com/compare/workflow-automation/index.md

## Which one, for what

### Gumloop (C)

Good for: A team that wants hosted agents with connectors, approvals and triggers, driven or configured by an outside agent through the API or MCP server.

Ahead on:
- Reliability, 82 against 67
- Schema & documentation, 83 against 75
- Payments & pricing, 20 against 0

Watch for: API keys and the `gumloop_api` OAuth scope need the Pro plan at $37 a month. The 14-day trial needs a card

### Prismatic (C)

Good for: A B2B software company that wants to build integrations once, deploy them per customer and let an in-app agent call them as MCP tools.

Ahead on:
- Security & auth, 59 against 50
- Maintenance & community, 83 against 77
- Transparency & trust, 65 against 57

Also in its favour:
- Runs on your own machine

Watch for: No prices on the pricing page. All three plans end in a demo request


## Score by category

| Category | Weight | Gumloop | Prismatic | Edge |
| --- | --- | --- | --- | --- |
| Reliability | 16% (20 this run) | 82 | 67 | Gumloop +15 |
| Performance | 10%, pending | pending | pending | not scored in this run |
| Schema & documentation | 13% (16.2 this run) | 83 | 75 | Gumloop +8 |
| Agent ergonomics | 13% (16.2 this run) | 66 | 63 | Gumloop +3 |
| Security & auth | 14% (17.5 this run) | 50 | 59 | Prismatic +9 |
| Payments & pricing | 10% (12.5 this run) | 20 | 0 | Gumloop +20 |
| Task success | 10%, pending | pending | pending | not scored in this run |
| Maintenance & community | 7% (8.8 this run) | 77 | 83 | Prismatic +6 |
| Transparency & trust | 7% (8.8 this run) | 57 | 65 | Prismatic +8 |
| Negative events | ≤15 | -2 | 0 | |
| **Total** | | **61.6 · C** | **59.1 · C** | |

## Facts side by side

| Fact | Gumloop | Prismatic |
| --- | --- | --- |
| Kind | HTTP API | HTTP API |
| Vendor | AgentHub Inc. | Prismatic Software Inc. |
| Hosted endpoint | `https://api.gumloop.com/api/v1` | `https://mcp.prismatic.io/mcp` |
| Transports | HTTP, Streamable HTTP | HTTP, Streamable HTTP, stdio |
| Auth | OAuth or key | OAuth |
| Pricing | Paid | Paid |
| x402 | no | no |
| Licence | Proprietary service under Gumloop's terms of service. The Python SDK and CLI repository and the npm package are Apache-2.0 | Proprietary service. The Prism CLI, the Spectral and embedded SDKs, the Prism MCP dev server and the Claude Code skills on GitHub are MIT |
| Read-only variant documented | no | yes |
| llms.txt | yes | yes |
| MCP registry | not listed | `io.github.prismatic-io/prism-mcp` |
| Last release | 2026-10-08 | 2026-10-06 |
| Terms last updated | no date given | no document linked |
| Privacy policy last updated | no date given | 2024-06-26 |
| Customer content may train models | yes |  |
| Terms restrict automated access | yes |  |
| Terms restrict benchmarking | not found in the text |  |
| Terms or service can change without notice | yes |  |
| Arbitration or class-action waiver | not found in the text |  |
| Popularity | 188 npm/wk, 2.9k PyPI/wk | 29 stars, 8.4k npm/wk |

## Verdicts

**Gumloop.** Gumloop's REST API has a public OpenAPI file with 105 operations, Markdown docs and a changelog with 28 dated releases since 9 July 2026. API keys need the $37 Pro plan, the trial needs a card, the key can travel in the URL, and self-serve content may be used to train Gumloop's models.

**Prismatic.** The GraphQL API covers 120 queries and 124 mutations with typed inputs, cursor pagination and Markdown documentation, and tokens follow seven user roles. No price is published, paid use runs under an agreement that is not public, and no API rate limit or idempotency key was found in the reviewed documentation.

## Before you call either

### Gumloop

1. Send the key as `Authorization: Bearer` and, for a personal key, add the `x-auth-key` header with the user ID. Do not put `api_key` in the URL
2. Create sessions with `POST /agents/{agent_id}/sessions`, then poll `GET /sessions/{session_id}`. A 202 means processing or queued, and the reply is not in the response
3. Supply your own `session_id` when creating a session. A repeat returns 409, which makes a retry safe
4. For streamed output send the same body with `stream: true` to `ws.gumloop.com`. `api.gumloop.com` answers 400 to it
5. Treat a webhook trigger URL as a password. It returns `{"success": true}` at once and never carries the agent's output

### Prismatic

1. Have a person run `prism login` once, then store the output of `prism me:token --type refresh` as `PRISM_REFRESH_TOKEN`. Access tokens last 7 days
2. Read the `errors` array on every mutation. A failed mutation still returns HTTP 200
3. Pass `sortBy` with `CREATED_AT` when paging. Without a sort order pages can repeat or skip records
4. Use the regional host for the tenant, such as `app.eu-west-1.prismatic.io` and `mcp.eu-west-1.prismatic.io`
5. Create a guest user for a read-only agent, because tokens have no scopes of their own

## Questions

### Which is better for AI agents, Gumloop or Prismatic?

Gumloop scores 61.6 (C) on agent readiness against Prismatic's 59.1 (C), and leads in 4 of 7 scored categories. Prismatic leads on security & auth, maintenance & community and transparency & trust.

### Do Gumloop and Prismatic need an API key?

Gumloop takes an API key or an OAuth sign-in. Prismatic uses an OAuth sign-in.

### Can an agent call Gumloop and Prismatic without installing anything?

Yes. Gumloop has a hosted endpoint at https://api.gumloop.com/api/v1 and Prismatic at https://mcp.prismatic.io/mcp.


## For agents

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

## Other comparisons with Gumloop or Prismatic

- [Activepieces API + MCP vs Gumloop](https://www.anchorterminal.com/compare/activepieces-vs-gumloop.md)
- [Activepieces API + MCP vs Prismatic](https://www.anchorterminal.com/compare/activepieces-vs-prismatic.md)
- [Gumloop vs Kestra](https://www.anchorterminal.com/compare/gumloop-vs-kestra.md)
- [Gumloop vs Make API + MCP](https://www.anchorterminal.com/compare/gumloop-vs-make.md)
- [Gumloop vs n8n API + MCP](https://www.anchorterminal.com/compare/gumloop-vs-n8n.md)
- [Gumloop vs Node-RED](https://www.anchorterminal.com/compare/gumloop-vs-node-red.md)
- [Gumloop vs Paragon ActionKit + MCP](https://www.anchorterminal.com/compare/gumloop-vs-paragon.md)
- [Gumloop vs Pipedream API + MCP](https://www.anchorterminal.com/compare/gumloop-vs-pipedream.md)
- [Gumloop vs Microsoft Power Automate](https://www.anchorterminal.com/compare/gumloop-vs-power-automate.md)
- [Gumloop vs Tray.ai API + MCP](https://www.anchorterminal.com/compare/gumloop-vs-tray.md)
- [Gumloop vs Windmill API + MCP](https://www.anchorterminal.com/compare/gumloop-vs-windmill.md)
- [Gumloop vs Workato API + MCP](https://www.anchorterminal.com/compare/gumloop-vs-workato.md)
- [Kestra vs Prismatic](https://www.anchorterminal.com/compare/kestra-vs-prismatic.md)
- [Make API + MCP vs Prismatic](https://www.anchorterminal.com/compare/make-vs-prismatic.md)
- [n8n API + MCP vs Prismatic](https://www.anchorterminal.com/compare/n8n-vs-prismatic.md)
- [Node-RED vs Prismatic](https://www.anchorterminal.com/compare/node-red-vs-prismatic.md)
- [Pipedream API + MCP vs Prismatic](https://www.anchorterminal.com/compare/pipedream-vs-prismatic.md)
- [Microsoft Power Automate vs Prismatic](https://www.anchorterminal.com/compare/power-automate-vs-prismatic.md)
- [Prismatic vs Tray.ai API + MCP](https://www.anchorterminal.com/compare/prismatic-vs-tray.md)
- [Prismatic vs Windmill API + MCP](https://www.anchorterminal.com/compare/prismatic-vs-windmill.md)
- [Prismatic vs Workato API + MCP](https://www.anchorterminal.com/compare/prismatic-vs-workato.md)
- [Paragon ActionKit + MCP vs Prismatic](https://www.anchorterminal.com/compare/paragon-vs-prismatic.md)