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API

Tool Agent API

Call Ecomwith tools from your agent, automation script, or internal workflow with an API key. This guide currently covers GTIN, QR Code, UTM Builder, and Break-even ROAS APIs.

Authentication
Create an API key from settings. The full secret is shown once, so copy it into your agent or secret manager. Later views only show a masked key.
Authorization: Bearer ecw_live_...
X-API-Key: ecw_live_...
Quota And Rate Limits
API usage is tracked separately. Responses include quota and rate-limit headers so your agent can decide whether to continue.
X-Quota-Limit: 1000
X-Quota-Remaining: 997
X-RateLimit-Limit: 30
Safe Retries
If a request times out or your agent retries automatically, send the same Idempotency-Key. The same request key and body reuse the result without duplicate generation or quota usage.
Idempotency-Key: order-sync-2026-06-14-001

Endpoints

GTIN API
Generate GTIN-14 numbers in batches. Quota is counted by generated numbers.
POST /api/v1/tools/gtin/generate
QR Code API
Generate SVG or PNG data URL QR codes from links or text. Quota is counted by request.
POST /api/v1/tools/qrcode/generate
UTM Builder API
Apply one UTM parameter set to one or many landing page URLs. Quota is counted by successfully built links.
POST /api/v1/tools/utm-builder/build
Break-even ROAS API
Calculate break-even ROAS, target-profit ROAS, and CPA guardrails from price, costs, fees, and refund reserve.
POST /api/v1/tools/break-even-roas/calculate
OpenAPI JSON
/api/v1/openapi.json
/api/v1/openapi.json