Free
$0
250 requests / mo
Hosted PDF API · MCP · n8n · Python
Fill, merge and inspect PDFs from an AI agent, an n8n workflow, or one line of Python.
PDFops is a hosted API for deterministic PDF work: fill AcroForm fields, merge documents, list a form's fields, generate an invoice from JSON. Same input, byte-identical output, every time — no headless browser, no Lambda layer, no per-document render tax. Why I built it.
Three kinds of callers use it most, and each has a first-class path. Plain HTTP works from everything else.
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AI agents · MCP
npx -y pdfops-mcpClaude Code, Claude Desktop, Cursor, any MCP client. Setup → -
No-code · n8n
n8n-nodes-pdfopsCommunity node, verified by n8n. Walkthrough → -
Python
pip install pdfopsZero dependencies, Python 3.9+; inspect, fill, merge, invoice. Guide →
Try it in your browser → Get a free API key
curl · invoice-template.pdf
curl -X POST https://pdfops.dev/api/fill-form \
-F "pdf=@invoice-template.pdf" \
-F 'fields={"customer_name":"Acme Co","total":"$1,250.00"}' \
-o filled.pdfWhat it is, in four bullets
- Hosted PDF API, globally distributed. Sub-100ms response times wherever your traffic is. No region config, no VPC tuning, no warm-pool sizing.
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Six endpoints today:
POST /api/fill-form(fill PDF form fields),POST /api/merge(merge N PDFs into one),POST /api/inspect(list a PDF's form fields),POST /api/invoice(a complete invoice PDF from JSON),POST /api/signup(self-serve API key),GET /api/usage(quota check). Prefer a UI? The free invoice generator, field inspector, and make-fillable editor run in your browser. Prefer no code at all? Email a blank form to fill@pdfops.dev and get it back filled. - Free to try. 100 requests per IP per month with no key at all, or a free API key with 250/month — email in, key out, no card. Paid tiers from $16/mo.
- Roughly 10x cheaper than incumbents. Indie is $16/mo for 4,000 requests — about $0.004 per document. The unit economics work because the platform PDFops runs on isn't where the incumbents priced their margins from.
Try it
Zero friction. Copy, paste, run. 100 requests per IP per month are free with no key at all — grab a free API key (250/mo) on the pricing page when you outgrow that. No terminal handy? The playground, the free invoice generator, and the free field inspector run the same API from your browser.
Fill a PDF form
No fillable PDF on hand?
Grab a sample invoice-template.pdf
— the field names match the curl below verbatim.
POST /api/fill-form
curl -X POST https://pdfops.dev/api/fill-form \
-F "pdf=@invoice-template.pdf" \
-F 'fields={"customer_name":"Acme Co","total":"$1,250.00"}' \
-o filled.pdf
The fields JSON keys must match AcroForm field
names that already exist in your PDF —
customer_name and total in the
sample above. Bring a template with named form fields you
authored in Acrobat / Preview / LibreOffice, or use the
sample to see the round-trip first.
Merge PDFs
POST /api/merge
curl -X POST https://pdfops.dev/api/merge \
-F "pdf=@part1.pdf" \
-F "pdf=@part2.pdf" \
-F "pdf=@part3.pdf" \
-o merged.pdfFull request/response schemas live in the docs. Calling from code? Per-language guides: fill a PDF in Python, in Node.js, or in JavaScript. For end-to-end patterns — invoices, contracts, reports — see the use cases.
Plans
The anonymous trial — 100 requests per IP per month, no signup — is what the playground and the curl above run on. Building for real? Pick a plan:
Indie Most popular
$16/mo
4K requests / mo
Pro
$79/mo
25K requests / mo
Enterprise
Custom
Volume · SLA
Coming from a different hosted PDF API? vs DocRaptor · vs PDFShift · vs PDFMonkey
Filling a government form? The form compatibility registry has tested field schemas and quirks for the W-9, W-4, 1040 and more.