What you get

Pass an OpenAPI/Swagger URL and all three are generated live — agent.txt, a working MCP server, and a CLI wrapper. A GitHub repo URL returns the inferred manifest. Snippets below are illustrative.

# https://yourcompany.com/agent.txt
name: yourcompany
version: 1.2.0
api: https://api.yourcompany.com
capabilities:
  - id: invoices.get
    method: GET
    path: /v1/invoices
  - id: invoices.post
    method: POST
    path: /v1/invoices

// src/index.ts — @modelcontextprotocol/sdk + zod
const server = new McpServer({ name: "yourcompany", version: "1.2.0" });

server.tool("invoices_get",
  "Get invoice (GET /v1/invoices/{id})",
  { "id": z.string(), query: z.record(z.string(), z.any()).optional() },
  async (args) => { /* calls your live API */ },
);
// …one tool per operation, ready to npm install && build.

# zero-dependency Node CLI — one command per operation
export YOURCOMPANY_API_URL=https://api.yourcompany.com
export YOURCOMPANY_API_KEY=...   # optional bearer token

node bin/cli.mjs invoices_get --id inv_123
node bin/cli.mjs --help

No OpenAPI spec?

The spec path generates a working MCP server + CLI right now. Full codegen straight from a bare GitHub repo (README → wired endpoints) is rolling out — join the waitlist and we'll email you when your repo can generate code, not just a manifest.

How it works

1. step 1
   Paste

   Give us your OpenAPI / Swagger JSON URL.

2. step 2
   Generate agent.txt

   We parse every operation into a capability and hand back a ready-to-host agent.txt manifest — instantly.

3. step 3
   Generate the code

   With an OpenAPI/Swagger URL you also get a working MCP server and a CLI wrapper — one tool per operation. Host the manifest at /agent.txt and ship.

Register & sign — so agents trust you

Agents now verify before they invoke. Register your tool to declare its scope and get a signed attestation + a hostable unfragile.yml. Then prove ownership (a 6-digit code) so your verdict becomes trusted — registration alone never inflates trust.

curl -X POST https://unfragile.ai/api/v1/register \
  -H "Content-Type: application/json" \
  -d '{
    "target": "npm:@yourco/mcp",
    "declaredPermissions": ["data.read"],
    "contactEmail": "dev@yourco.com"
  }'

Returns a signed registration, your unfragile.yml, and the claim link. Then verify it anytime: POST /api/v1/verify {"target":"npm:@yourco/mcp"}.

How the trust layer works →