# Vextorium PDF Merger

> Vextorium PDF Merger is a paid API for AI agents from api.vextorium.com, paid per call via x402, $0.004/call, status unknown (last checked 2026-10-20).

Merges 2 to 10 PDFs (provided as URLs) into a single PDF, returned as a base64-encoded string.

## Facts

- Endpoint: POST https://api.vextorium.com/pdf-unir-pago?utm_source=zero.xyz
- Price: $0.004/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-20
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/vextorium-pdf-merger-e08789ff
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_uQB5iecc4CaA7LXmO0htT

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 vextorium-pdf-merger-e08789ff -d '<json body>'
```

Example prompt: Can you merge these three PDFs into one document for me, in this order: https://example.com/doc1.pdf, https://example.com/doc2.pdf, and https://example.com/doc3.pdf?

## When to prefer this

Choose this endpoint when you need to merge 2–10 PDFs provided as public URLs into a single document and want the result back as base64 — ideal for automated document assembly pipelines where you don't want to handle file uploads. Prefer this over alternatives when documents are already hosted at accessible URLs and you need a quick, pay-per-call merge without managing infrastructure.

## Known failure modes

- Invalid or unreachable PDF URLs return an error
- More than 10 URLs provided exceeds the limit
- Fewer than 2 URLs provided is below the minimum
- Malformed URLs or non-PDF content at a URL cause processing failure
- Network timeout fetching a remote PDF
- Payment failure blocks the request

## How this service works

Merge 2 to 10 PDFs (URLs) into one, in the given order, returned in base64.

## Output

A JSON object containing the merged PDF as a base64-encoded string, the total byte size of the merged file, the total number of pages, and the number of source documents that were combined.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "urls": {
   "type": "array",
   "items": {
    "type": "string"
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "bytes": 24905,
  "base64": "JVBERi0xLjQKJeLjz9MKMSAwIG9iago8PAovUHJvZHVjZXIgKHB5cGRmKQo+PgplbmRvYmoKMiAwIG9iago8PAovVHlwZSAvUGFnZXMKL0NvdW50IDIKL0tpZHMgWyA0IDAgUiAxMiAwIFIgXQo+PgplbmRvYmoKMyAwIG9iago8PAovVHlwZSAvQ2F0YWxvZwovUGFnZXMgMiAwIFIKPj4KZW5kb2JqCjQgMCBvYmoKPDwKL1R5cGUgL1BhZ2UKL1Jlc291cmNlcyA1IDAgUgovTWVkaWFCb3ggWyAwIDAg…",
  "paginas": 2,
  "documentos": 2
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/vextorium-pdf-merger-e08789ff/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.vextorium.com](https://www.zero.xyz/host/api.vextorium.com/llms.txt)