Fulcrum API
Battle-tested. Ready to publish and sell.

Ship a real API + MCP SaaS
in a single Python class.

A professional Django + FastMCP boilerplate with auth, billing, observability, and security baked in. Add one decorated endpoint — it's live as REST and as a Claude.ai / ChatGPT MCP tool.

Get started Read the docs 
# apps/app_endpoints/hello/endpoints.py
@endpoint(slug="hello", version="v1", credits=0)
class Hello(Endpoint):
    Input  = HelloInput
    Output = HelloOutput

    async def run(self, inp, ctx):
        return HelloOutput(greeting=f"Hello, {inp.name}")
{}

REST + MCP from one class

Decorate a Pydantic-typed run() and your endpoint exposes both an HTTP route and a Claude.ai / ChatGPT MCP tool — no duplicate code.

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Stripe + credits, race-safe

Plans, subscriptions, credit packages, idempotent webhooks, and a ledger that won't go negative under load. Ship-and-charge from day one.

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Magic-link + OAuth 2.1

Email-first sign-in for humans. PKCE + dynamic-client-registration OAuth for one-click MCP connectors.

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Built-in observability

APICallLog, ErrorLog, p50/p95/p99 percentile rollups, structured JSON logs, and a Sentry hook that's opt-in via one env var.

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Hardened by default

CSP, HSTS, security.txt, staff 2FA, idempotency keys, GDPR delete + export, brute-force lockouts. securityheaders.com grade A out of the box.

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Operator console

Hand-built admin panel — users, plans, errors, performance, jobs, webhooks, audit, settings — all in one professional UI you can rebrand.