CrateAPI without code

Any no-code tool that can send an HTTP request can call CrateAPI directly — no SDK, no server, no code. Below: ready-to-import templates for Make and n8n, and exact copy-paste steps for Zapier.

How this works

Every integration below is really just one HTTP call, configured through a different UI. /v1/validate/ubl and /v1/validate/cii are free and need no API key — the easiest way to try the whole thing right now, invoice XML in, a JSON report out. /v1/generate/*, /v1/convert/* and /v1/render/* are billable and read the X-API-Key header — get a free key on your account page (a free key still includes 50 billable calls a month, no card required).

• free Call it directly, right now — no signup, no key.
• needs API key Add your X-API-Key from your account — same URL pattern, a different endpoint.

Make

Make's generic HTTP module — HTTP → Make a request — can call any URL, including CrateAPI. Unlike some competitors, that module ships on Make's free plan, not gated behind a paid tier.

Try it free: validate an invoice

1. Create a scenario, add the HTTP app → Make a request module — or skip straight to step 2 and import the file below.
2. Scenario menu (⋮) → Import Blueprint → pick the downloaded .json file.
3. Method POST, URL https://api.crateapi.com/v1/validate/ubl, header Content-Type: application/xml, body = an invoice XML — the blueprint already ships with a real sample wired in.
4. Run it once. CrateAPI answers with a JSON report — valid, fatal/warning counts, findings — the rest of the scenario can branch on.

curl -X POST "https://api.crateapi.com/v1/validate/ubl" \
  -H "Content-Type: application/xml" \
  -H "X-CrateAPI-Source: make" \
  --data-binary @invoice.xml

n8n

n8n's built-in HTTP Request node does the same job. n8n is free and open-source, so this works identically on n8n Cloud or on an instance you run yourself.

Try it free: validate an invoice

1. Create a workflow, add an HTTP Request node — or skip to step 2 and import the file below.
2. Workflow menu (⋯) → Import from File → pick the downloaded .json file (it already includes a manual trigger, ready to run).
3. Method POST, URL https://api.crateapi.com/v1/validate/ubl, header Content-Type: application/xml, raw body = an invoice XML — the workflow already ships with a real sample filled in.
4. Click Test workflow. The node's output is the same JSON report — valid, fatal/warning counts, findings.

curl -X POST "https://api.crateapi.com/v1/validate/ubl" \
  -H "Content-Type: application/xml" \
  -H "X-CrateAPI-Source: n8n" \
  --data-binary @invoice.xml

Self-hosting n8n instead of using n8n Cloud? Nothing above changes — it's the same HTTP Request node either way.

Zapier

Honest note first: the generic action that can call any URL — Webhooks by Zapier — is not on Zapier's free plan; it needs one of Zapier's paid plans. Zapier also has no file-import for a single Zap, so there's no template to download here — just the exact fields to type in.

Try it free: validate an invoice

1. Create a Zap, add the action app Webhooks by Zapier, event POST.
2. Fill in the fields below exactly, then send a test — CrateAPI answers with a JSON report.

Method

POST

URL

https://api.crateapi.com/v1/validate/ubl

Headers

Content-Type: application/xml
X-CrateAPI-Source: zapier

Payload

Raw — paste an invoice XML

curl -X POST "https://api.crateapi.com/v1/validate/ubl" \
  -H "Content-Type: application/xml" \
  -H "X-CrateAPI-Source: zapier" \
  --data-binary @invoice.xml