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Relaystation PDF Form Fill
x402
Relaystation PDF Form Fill is a paid API for AI agents from api.relaystation.ai, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-15).
Programmatically fill or flatten PDF forms by submitting field values and receiving a completed PDF document in return.
Price / call$0.01
Success—
StatusUnknown
How this service works
$0.001/page. Fill or flatten PDF forms programmatically — field values in, finished PDF out. 1¢ x402 min; remainder auto-credits — relaystation.ai/penny
Output
A completed, optionally flattened PDF document with all specified form fields populated with the provided values, returned as binary PDF data ready for download, storage, or further processing.
Example use cases
Auto-fill job application PDF
“Take this job application PDF and fill it in with my details — name John Doe, email john@example.com, position Software Engineer, start date 2025-07-01 — then flatten it so the fields can't be edited and send it back to me.”
Generate completed invoice PDF
“I have a PDF invoice template with blank fields for client name, invoice number, amount, and due date. Fill those in with Acme Corp, INV-2045, $1,850, and 2025-07-15 respectively, and give me the finished PDF.”
Prefill government form for submission
“Here's a W-9 PDF form — fill in the fields with my business name 'Sunrise Consulting LLC', tax ID 12-3456789, address 100 Main St, and entity type LLC, then flatten and return the completed form.”
Technical details
Endpoint
POSThttps://api.relaystation.ai/v1/pdf/formWhen to prefer
Choose this endpoint when you need to programmatically populate PDF form fields with structured data and receive a ready-to-use document in return. Ideal for automating document workflows — invoices, applications, contracts, government forms — where you have a reusable PDF template and need to fill it with dynamic values at low cost ($0.001/page). Prefer this over e-signature services (like the sibling Relaystation endpoint) when you only need field-filling without a signing workflow, and over OCR/extraction endpoints when your goal is writing data into a PDF rather than reading data out.
Side effects
- Invalid or corrupt PDF input — returns error if the source PDF cannot be parsed
- Field name mismatch — if provided field names do not match fields in the PDF, those fields may be skipped or error returned
- PDF is not a fillable form — flat/scanned PDFs without form fields cannot be filled
- Payment failure — x402 micropayment of $0.01 USDC not completed, request rejected
- Oversized PDF — very large files may exceed processing limits
- Malformed field values — incompatible data types for specific field types (e.g. text in date fields)
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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