MCP servers and ChatGPT apps for SaaS
How to let your customers use your product from inside Claude and ChatGPT, safely.
- How to build an MCP server for your SaaS product
A practical plan for SaaS teams: which tools to expose, transport, auth, testing in Claude and ChatGPT, and what it takes to ship.
- How to add a ChatGPT app to your SaaS
ChatGPT apps are built on MCP. What you need: a remote MCP server, OAuth, optional UI components, and app review.
- MCP server development cost: what SaaS teams pay (estimates)
Rough cost ranges for an MCP server: pilot, production build with OAuth, hosting, and upkeep. Labelled as estimates.
- MCP vs API: what SaaS teams actually need
MCP does not replace your REST API. How they differ, when MCP is worth it, and how they fit together.
- MCP server authentication: an OAuth 2.1 guide for SaaS teams
How remote MCP servers authenticate users: OAuth 2.1 with PKCE, protected resource metadata, client registration, scopes and token checks.
- MCP server for a REST API: generate from OpenAPI or hand-write?
How to turn an existing REST API and OpenAPI spec into an MCP server, what generators get wrong, and a curation checklist.
- MCP server security and rate limiting checklist
What to get right before customers connect AI assistants to your product: scopes, confirmations, prompt injection, logging and limits.
- How to publish an MCP server: official registry, Smithery and awesome lists
Getting your MCP server found: server.json for the official MCP registry, Smithery, and awesome-mcp-servers.
- MCP server for CRM SaaS: tools, risks and scope
What an MCP server for a CRM product should expose first, the risks of AI writes on customer records, and rough effort.
- MCP server for billing and subscription SaaS
Tools to expose for billing and invoicing products, why writes need extra care, and rough effort.
- MCP server for scheduling and booking SaaS
Tools for booking, availability and rescheduling products, time-zone pitfalls, and rough effort.
- MCP server for healthcare SaaS: what is safe to build first
A careful scope for clinic, practice-management and health SaaS: non-clinical tools first, PHI handling, BAAs and logging.
- MCP server for helpdesk and support SaaS
Tools for support and ticketing products, prompt-injection risk in ticket text, and rough effort.
- Open-source example: an MCP server for Canny
A working TypeScript MCP server you can read and copy.
Cofounderbase build service
Get a free 2-minute demo of your product in Claude
Besides running this directory, our team builds MCP servers and ChatGPT apps for small SaaS. Send your product URL and we'll record a short video of it working inside Claude, built only from your public API docs. Free, no call needed. Pilots start at $1,500. This service is separate from the agency rankings, which it never affects.
Prefer email? Write to us. Want an outside agency instead? See agencies that do MCP work.
Agencies in our index that mention MCP work
- Teamvoy (Ukraine)
- AiAdvisors (Poland)
- Context Studios (Germany)
- AI Agency Manchester (United Kingdom)
- Focused (United States)
- Autor Technologies (Canada)
- Pentridge (United States)
- Hourglass AI (Australia)
- Enabled Minds (United States)
- AppStream Studio (United States)
- Duotach (Argentina)
- Flowtivity (Australia)