# AgentRXI PDF Form Fill, List & Merge

> AgentRXI PDF Form Fill, List & Merge is a paid API for AI agents from agentrxi.com, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-15).

List fillable fields of a PDF, fill them with text/checkbox/dropdown values and optionally flatten, or merge up to 10 PDFs into one — returning the result as base64.

## Facts

- Endpoint: GET https://agentrxi.com/v1/pdf/fill?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/agentrxi-pdf-form-fill-list-merge-ef27dcd0
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_ts3FmP7YXO8WFdlippG57

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability agentrxi-pdf-form-fill-list-merge-ef27dcd0
```

Example prompt: Take this PDF form at https://example.com/w9.pdf, fill in the name field with 'Acme Corp', the EIN field with '12-3456789', check the LLC checkbox, and return the flattened PDF.

## When to prefer this

Choose this endpoint when you need to programmatically inspect, fill, or merge PDF forms without setting up a PDF processing library. Ideal for automating document workflows where form field names are unknown in advance (use list first, then fill), or when combining multiple PDFs into one deliverable. Particularly suited for AI agent workflows that need to handle PDF forms end-to-end at low cost ($0.01/call) via x402 pay-per-call.

## Known failure modes

- Invalid or inaccessible PDF URL returns an error
- Malformed fields JSON causes fill to fail
- More than 10 URLs provided to merge action exceeds limit
- PDF is not a fillable form — list and fill actions return empty or error
- Field names in JSON don't match actual PDF field names — fields left unfilled
- Base64 PDF input is corrupted or invalid encoding

## How this service works

PDF forms: list the fillable fields of any PDF, fill them (text, checkboxes, dropdowns) and optionally flatten, or merge up to 10 PDFs into one. Returns the finished PDF as base64. Also callable as GET with the same fields as query parameters.

## Output

Returns a base64-encoded string of the resulting PDF. For the 'list' action, returns the names and types of all fillable fields in the PDF. For 'fill' and 'merge' actions, returns the completed or merged PDF encoded as base64, which can be decoded to a binary PDF file.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "properties": {
      "url": {
       "type": "string"
      },
      "urls": {
       "type": "string",
       "description": "| separated (merge)"
      },
      "action": {
       "type": "string",
       "description": "list | fill | merge"
      },
      "fields": {
       "type": "string",
       "description": "JSON {field name: value}"
      },
      "flatten": {
       "type": "boolean"
      },
      "pdf_base64": {
       "type": "string"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/agentrxi-pdf-form-fill-list-merge-ef27dcd0/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from agentrxi.com](https://www.zero.xyz/host/agentrxi.com/llms.txt)