Free to act ( 75 )

5/5Excellent

Per-service tool docs published in llms.txt and a simple PAT instead of IAM — far easier than AWS for the same class of work.

Jira (Atlassian)

Widest product coverage of any PM server; the gate is rate quota by plan tier, not access.

Sentry

The reference example of a debugging-loop server: official, remote, free tier, and it pairs with sentry-cli for release work.

GitLab

Two good paths — hosted server or glab CLI in MCP mode — and self-managed instances are supported, which GitHub's hosted endpoint can't match.

Neon

Best agent-safety story in databases: instant branches mean a destructive agent action is a discarded branch, not an incident.

Stripe

The most complete agent story in payments: official server, restricted keys, a real CLI and 92KB of llms.txt. Write tools move real money.

Webflow

Strongest agent story among site builders: official, open-source, OAuth, and element/component/style writes no longer need a human in the Designer.

MongoDB

Covers both data and infrastructure, which is unusual — and means an agent can spin up billable clusters. Scope the API key.

Supabase

Among the most capable database servers — which is the risk: unrestricted, an agent can alter schema. Read-only flag first, loosen deliberately.

Netlify

Write-capable where Vercel is not — an agent can actually ship a site and wire up functions end to end.

Grafana

Free, open-source and write-capable on dashboards — the default pick if you self-host your observability stack.

monday.com

Was among the first five official servers in the wild; read/write is solid, watch the per-plan API complexity budget.

PagerDuty

Both hosted and local options, plus a published MCP OpenAPI spec — one of the more thoughtfully shipped on-call servers. Write scopes touch live incidents, so gate them.

Calendly

One of the few schedulers that chose a hosted remote server — no local process, standard OAuth, and it works before you pay.

Zoom

Official MCP docs exist and the API underneath is mature; the practical gate is that the useful data (recordings, transcripts) lives on paid plans.

Ramp

The most complete finance-ops surface in this category, and scope-gated rather than all-or-nothing. Grant read scopes first.

Vercel

Great for debugging a deployment, useless for changing one — the MCP server is read-only, so writes still go through the CLI.

FreeRead onlyHeadless

Railway

Fastest path from 'agent has a repo' to 'agent has a running deployment' — local and hosted servers, GraphQL API, solid CLI.

Cloudflare

Highest agent-readiness in infrastructure: multiple official servers, wrangler CLI, OAuth, free tier, and first-class docs for agents.

Attio

Built after MCP existed and it shows — hosted server, clean object model, write access without an enterprise conversation.

Notion