AI Model Pricing & Change Data API

Data API

Programmatic access to stored price records with source links where available, published API changes, and webhooks.

Public API health checkHTTP

$ curl https://api.modelpricelab.com/health

# Returns service status and timestamp

Quick start

Fetch stored model price records with a single request.

curl -H "Authorization: Bearer mpl_your_api_key" \
  "https://api.modelpricelab.com/v1/prices"

Endpoint reference

API Free can call only GET /v1/prices. /v1/changes and all webhook routes require a current Developer plan ($39/mo, see Pricing).

Endpoint	Method	Auth	Description	Limit
/v1/prices	GET	API key	Returns stored model price records across vendors and platforms.	API Free or current paid entitlement
/v1/changes	GET	API key	Returns published price and API changes; incidents are excluded by default.	Current paid entitlement required
/v1/webhooks	GET	API key	List configured webhook endpoints.	Current paid entitlement required
/v1/webhooks	POST	API key	Subscribe an HTTPS URL to change.alert events.	Current paid entitlement required
/v1/webhooks/{id}	DELETE	API key	Remove a webhook subscription.	Current paid entitlement required

Webhook signature verification

Only accounts on a current Developer plan receive deliveries. Verify the exact raw body with HMAC SHA-256 from x-mpl-signature (sha256=…).

import { createHmac, timingSafeEqual } from 'node:crypto';

const signature = req.headers['x-mpl-signature'];
// Capture the exact raw UTF-8 request bytes before JSON parsing.
const rawBody = req.rawBody;
const expected = 'sha256=' + createHmac('sha256', WEBHOOK_SECRET)
  .update(rawBody)
  .digest('hex');

const valid = typeof signature === 'string'
  && signature.length === expected.length
  && timingSafeEqual(Buffer.from(signature), Buffer.from(expected));

if (!valid) {
  res.status(401).send('Invalid signature');
  return;
}

Rate limits & quotas

Each API key has a daily request quota based on its plan. Requests exceeding the quota return HTTP 429.

API Free

Requests: 100/day

Record semantics: Stored records; no fixed freshness promise

Developer plan ($39/mo)

Requests: 10,000/day, incl. changes & webhooks

Record semantics: Stored records; not promised real-time

Quotas reset daily at UTC midnight. When exhausted, buy a top-up pack ($5 / 50,000 requests / 30 days, stackable) to keep calling immediately — responses then carry X-RateLimit-Topup: true. GET /v1/usage reports balance and reset time at any time (introspection is unmetered).

curl "https://api.modelpricelab.com/v1/usage" -H "Authorization: Bearer $MPL_KEY"

# → { "plan": "developer", "daily_quota": { "limit": 10000, "remaining": 9962,
#     "reset_at": "2026-10-06T00:00:00Z" }, "topup": { "remaining": 49997 } }

Create your API key in Dashboard

Get API key