Merge PDFs

Combine two or more PDFs into a single document. Supports URLs, base64, multipart uploads, and custom metadata.

Security Scan

The skill's instructions, required inputs, and authentication all align with a straightforward PDF-merge API usage; the main risk is that user files and an API key are sent to a third-party service (pdfapihub.com).

Purpose & Capability

Name/description (merge PDFs) match the declared endpoint, example requests, and required inputs (urls, base64 files, multipart). The skill requires an API key in the CLIENT-API-KEY header—this is proportionate and expected for a hosted PDF-merge service.

Instruction Scope

SKILL.md instructs the agent to send provided URLs or file contents to pdfapihub.com and to include an API key in the header. It does not instruct the agent to read unrelated local files or environment variables. Note: using the skill will upload documents (or their URLs) to an external service, which is a privacy/security consideration.

Install Mechanism

Instruction-only skill with no install spec and no code files—nothing is written to disk or downloaded during installation, reducing supply-chain risk.

Credentials

No environment variables or system config paths are required. The only credential required is an API key the user supplies in the CLIENT-API-KEY header, which is appropriate for the described hosted API.

Persistence & Privilege

always:false and no install-time persistence or modification of other skills. The skill may be invoked autonomously (platform default), which is normal and not flagged here by itself.

Assessment

This skill calls a third-party API (pdfapihub.com) to merge PDFs. Before using it, consider: (1) Do not upload sensitive/private documents unless you trust the service and its retention/privacy policy; (2) protect your API key—only provide it to trusted services and treat it like a secret; (3) public Google Drive share links will be converted to direct-download URLs, but private Drive files will not be accessible unless you provide accessible links or file contents; (4) if you need offline/local merging for confidentiality, use a local tool instead of this hosted API; (5) confirm the service uses HTTPS and review pdfapihub.com's terms/privacy if handling regulated data. Otherwise the skill appears coherent and proportional to its stated purpose.

What It Does

Combines two or more PDFs into a single document. Google Drive share links are automatically converted to direct-download URLs.

When to Use

• Combine multiple PDF invoices, reports, or contracts into one file
• Merge chapters or sections into a single document

Required Inputs

Provide one of:

• urls — array of PDF URLs (2-25)
• files — array of base64-encoded PDFs
• Multipart upload with files field(s)

Authentication

Send your API key in the CLIENT-API-KEY header.

Get your free API key at https://pdfapihub.com. Full API documentation is available at https://pdfapihub.com/docs.

Use Cases

• Invoice Bundling — Combine monthly invoices into a single PDF for clients
• Report Assembly — Merge cover page, table of contents, and report chapters into one document
• Legal Document Packets — Bundle contracts, appendices, and exhibits into one filing
• Student Submissions — Merge multiple assignment PDFs into one submission file
• Mortgage/Loan Packages — Combine application forms, ID scans, and financial docs into one package
• Book Assembly — Merge individual chapter PDFs into a complete manuscript

Limits

Constraint	Value
Max input files	25
Max pages per document	200
Max total pages	500
Max input file size	50 MB
Download timeout	60 s

Example Usage

curl -X POST https://pdfapihub.com/api/v1/pdf/merge \
  -H "CLIENT-API-KEY: your_api_key" \
  -H "Content-Type: application/json" \
  -d '{
    "urls": [
      "https://pdfapihub.com/sample.pdf",
      "https://pdfapihub.com/sample1.pdf"
    ],
    "output": "url"
  }'