Paragon ActionKit + MCP vs Prismatic

Paragon ActionKit + MCP

Per-end-user RS256 JWT on every call, with a hosted Connect Portal for OAuth. No published prices and no self-serve paid plan.

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.

Paragon ActionKit + MCP

1. Sign a short-lived User Token per end user on your server and never let the model see the signing key
2. Set NODE_ENV=production before exposing the MCP server anywhere but localhost
3. Fetch the tool list once per session with categories set, and cache it
4. Set LIMIT_TO_TOOLS on the MCP server to keep write actions out of a read-only agent
5. Proxy API requests count as tasks, so prefer ActionKit tools for routine actions

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