Emboss — PDF Form-Filling and Fax Delivery API

x402

Emboss — PDF Form-Filling and Fax Delivery API is a paid API for AI agents from api.getemboss.ai, paid per call via x402, $0.03/call, status unknown (last checked 2026-10-17).

Fill a PDF form with AI-proposed answers sourced from supporting documents, then deliver the completed form by fax to a specified phone number.

Price / call$0.03

Seller volume →—

Success—

StatusUnknown

How this service works

Turn a blank PDF and your data into finished forms. Emboss proposes each answer with its source, fills and verifies the PDF, and returns a receipt.

Output

Returns a JSON object containing a job_id, initial status ('ready'), a quote_id, a status_url for polling job progress, a proposal_id and proposal_url for reviewing AI-proposed answers with their sources, and a commit_token to authorize the final fill-and-send step.

Example use cases

Medical intake form faxed to clinic

“I need you to fill out this patient intake PDF at https://hospital.org/intake.pdf using my prior records artifact abc-123 and fax the completed form to +13105550177.”

Insurance claim form submission by fax

“Take this blank insurance claim form at https://insurer.com/claim.pdf, fill it in using my supporting documents from artifact id def-456, and fax it to the claims department at +18005550234.”

Government application form delivery

“Fill out this government application form from https://agency.gov/app.pdf using the documents I provided in artifact xyz-789 and send the completed form by fax to +12025550188.”

Technical details

Endpoint

POSThttps://api.getemboss.ai/pay/fax?utm_source=zero.xyz

When to prefer

Choose this endpoint when you need to both AI-fill a PDF form AND deliver it by fax in one workflow — particularly for healthcare, legal, or insurance use cases where fax is the required delivery channel. If you only need to fill a PDF without faxing it, use the sibling fill-only endpoint. Prefer this over manual faxing services when you also want AI-sourced field proposals with citations from supporting documents.

Side effects

Invalid or unreachable pdf_url returns an error before processing begins
Fax number not in valid E.164 format causes request rejection
More than one of pdf_url, pdf_base64, artifact_id, or sources provided simultaneously causes a validation error
Referenced artifact_id not found or token mismatch returns unauthorized error
PDF has no detectable form fields, resulting in an empty proposal
Fax delivery failure to unreachable or invalid destination number
Payment not completed via x402 results in 402 response before job is queued

Input

Schema · Request body

Field	Type	Description
to	string	Destination fax number in E.164 form.
pdf_url	string	public https URL of the PDF form to process
sources	array	A list of prior artifacts, faxed together as one packet, in place of pdf_url/pdf_base64/artifact_id -- exactly one of sources, pdf_url, pdf_base64, or artifact_id is required.
pdf_base64	string	the PDF form as base64 (alternative to pdf_url)
artifact_id	string	The id of a previously registered artifact to fax, in place of pdf_url/pdf_base64 -- exactly one of pdf_url, pdf_base64, or artifact_id is required.
artifact_token	string	The bearer token for artifact_id, required whenever the artifact has no owner account (an anonymous caller's own prior result).

Output

Schema · Response

{
  "type": "json",
  "example": {
    "job_id": "<uuid>",
    "status": "ready",
    "quote_id": "<uuid>",
    "status_url": "https://api.getemboss.ai/pay/jobs/<uuid>?token=<token>",
    "proposal_id": "<uuid>",
    "commit_token": "<token>",
    "proposal_url": "https://api.getemboss.ai/proposals/<uuid>?token=<token>"
  }
}

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How this service works

Turn a blank PDF and your data into finished forms. Emboss proposes each answer with its source, fills and verifies the PDF, and returns a receipt.

Output

Example use cases

Medical intake form faxed to clinic

“I need you to fill out this patient intake PDF at https://hospital.org/intake.pdf using my prior records artifact abc-123 and fax the completed form to +13105550177.”

Insurance claim form submission by fax

“Take this blank insurance claim form at https://insurer.com/claim.pdf, fill it in using my supporting documents from artifact id def-456, and fax it to the claims department at +18005550234.”

Government application form delivery

“Fill out this government application form from https://agency.gov/app.pdf using the documents I provided in artifact xyz-789 and send the completed form by fax to +12025550188.”

Technical details

Endpoint

POSThttps://api.getemboss.ai/pay/fax?utm_source=zero.xyz

When to prefer

Side effects

Invalid or unreachable pdf_url returns an error before processing begins
Fax number not in valid E.164 format causes request rejection
More than one of pdf_url, pdf_base64, artifact_id, or sources provided simultaneously causes a validation error
Referenced artifact_id not found or token mismatch returns unauthorized error
PDF has no detectable form fields, resulting in an empty proposal
Fax delivery failure to unreachable or invalid destination number
Payment not completed via x402 results in 402 response before job is queued

Input

Schema · Request body

Field	Type	Description
to	string	Destination fax number in E.164 form.
pdf_url	string	public https URL of the PDF form to process
sources	array	A list of prior artifacts, faxed together as one packet, in place of pdf_url/pdf_base64/artifact_id -- exactly one of sources, pdf_url, pdf_base64, or artifact_id is required.
pdf_base64	string	the PDF form as base64 (alternative to pdf_url)
artifact_id	string	The id of a previously registered artifact to fax, in place of pdf_url/pdf_base64 -- exactly one of pdf_url, pdf_base64, or artifact_id is required.
artifact_token	string	The bearer token for artifact_id, required whenever the artifact has no owner account (an anonymous caller's own prior result).

Output

Schema · Response

{
  "type": "json",
  "example": {
    "job_id": "<uuid>",
    "status": "ready",
    "quote_id": "<uuid>",
    "status_url": "https://api.getemboss.ai/pay/jobs/<uuid>?token=<token>",
    "proposal_id": "<uuid>",
    "commit_token": "<token>",
    "proposal_url": "https://api.getemboss.ai/proposals/<uuid>?token=<token>"
  }
}