Fulcrum API

curl -X POST https://api.fulcrumgo.com/api/v1/async-demo \
  -H "Authorization: Bearer mcpsk_<your_api_key>" \
  -H "Content-Type: application/json" \
  -d '{
  "n": 21,
  "sleep_seconds": 1.0
}'

Add this server to Claude Desktop's claude_desktop_config.json. The endpoint becomes a callable tool inside Claude. See the MCP setup guide for the full walk-through.

{
  "mcpServers": {
    "this-api": {
      "url": "https://api.fulcrumgo.com/mcp",
      "transport": "http",
      "auth": {
        "type": "bearer",
        "token": "mcpsk_<your_api_key>"
      }
    }
  }
}

Inside Claude this endpoint surfaces as the tool async-demo.

Standard requests — no custom SDK needed. pip install requests first.

import requests

r = requests.post(
    "https://api.fulcrumgo.com/api/v1/async-demo",
    headers={"Authorization": "Bearer mcpsk_<your_api_key>"},
    json={
  "n": 21,
  "sleep_seconds": 1.0
},
)
r.raise_for_status()
print(r.json())

Plain fetch. Works in Node 18+, Deno, Bun, and any modern browser.

const r = await fetch("https://api.fulcrumgo.com/api/v1/async-demo", {
  method: "POST",
  headers: {
    "Authorization": "Bearer mcpsk_<your_api_key>",
    "Content-Type": "application/json",
  },
  body: JSON.stringify({
  "n": 21,
  "sleep_seconds": 1.0
}),
});
if (!r.ok) throw new Error(`HTTP ${r.status}`);
console.log(await r.json());

Input

Field	Type	Required	Default	Description
n	integer	optional	21	Number to double. maximum=10000000 minimum=0
sleep_seconds	number	optional	1.0	How long the worker pauses before returning (verify-gate knob). maximum=30.0 minimum=0.0

Output

Field	Type	Required	Default
job_id	string	required	—
status	string	required	—
status_url	string	required	—

Try it

Fires a real POST /api/v1/async-demo from your browser. Charges 0 credits per call against your account.