PDFops

Fill PDF forms from an AI agent over remote MCP.

CommunityOnlineNo sign-inGlobalFreeRead-only

What it can do

  • Pdf Inspect: List a PDF's AcroForm form fields — names, types, options, current values, per-field maxLength where declared — plus a paste-ready fillTemplate object for pdf_fill and a hasXFA flag (hybr
  • Pdf Fill: Fill AcroForm form fields in a PDF and return the result. Field names must exist in the PDF (use pdf_inspect first). All values are strings; checkboxes take "true"/"false"; dropdown/radio/op
  • Pdf Merge: Merge two or more PDFs into one, in the order given, and return the result. Sources are read only and never modified. Returns the merged PDF inline as an application/pdf resource. This tool

What data it sees

Do you need an account

No: the server works without sign-in

Fill PDF forms from an AI agent over remote MCP. Five tools: inspect AcroForm fields, fill them, merge PDFs, generate invoice PDFs, and check usage. Inputs are https URLs or base64 data URIs. Works without a key (keyless trial cap, 100 calls/IP/month); a free API key from https://pdfops.dev/pricing#free-key raises it.

How to connect

How to connect PDFops to Claude

The server address to paste into Claude settings:

https://pdfops--tj-r4v3.run.tools

  1. Open Claude (claude.ai or the desktop app).
  2. Go to Settings → Connectors.
  3. Click Add custom connector.
  4. Paste the server address copied below into Remote MCP server URL and click Add.
  5. In a chat, click + → Connectors and switch the new connector on.

Custom connectors are available on Free, Pro, Max, Team and Enterprise plans (Free is limited to one). On Team and Enterprise an organization Owner adds the connector first under Organization settings → Connectors.

Authorization

After you click Add, a sign-in window for the service opens. Sign in with your own account and approve access. Claude never sees your password.

How to connect PDFops to ChatGPT

The server address to paste into ChatGPT settings:

https://pdfops--tj-r4v3.run.tools

  1. Open ChatGPT in a browser (chatgpt.com). A Plus, Pro, Business, Enterprise or Edu plan is required.
  2. Turn on developer mode once: Settings → Apps → Advanced settings → Developer mode.
  3. Open Settings → Connectors and click Create.
  4. Fill in the form: Name (anything), Description (one line about what the service does), MCP server URL (copy it below).
  5. Under Authentication choose OAuth if the service requires sign-in, otherwise None. Click Create.
  6. In a new chat open + → Apps/Connectors and enable the connector.

OpenAI has renamed this section before (Connectors → Apps/Plugins). If the label differs, search settings for "developer mode". On Business/Enterprise workspaces an admin must allow custom connectors first.

Authorization

On first use ChatGPT opens the service's sign-in window. Sign in and approve access.

How to connect PDFops to Cursor

The server address to paste into Cursor settings:

https://pdfops--tj-r4v3.run.tools

Fastest: click Open in Cursor below and confirm the prompt.

Manually:

  1. In Cursor open Settings → Cursor Settings → MCP and click Add new global MCP server.
  2. Paste the JSON copied below into ~/.cursor/mcp.json (per project: .cursor/mcp.json in the repo root).
  3. Save the file. The server appears in the MCP list; authorize it there if asked.

Authorization

If the service needs sign-in, an authorize button appears next to the server in the MCP list.

Server tool list (5)

Raw names from tools/list. Only developers need these.

pdf_inspectList a PDF's AcroForm form fields — names, types, options, current values, per-field maxLength where declared — plus a paste-ready fillTemplate object for pdf_fill and a hasXFA flag (hybrid AcroForm/XFA inputs lose their XFA layer when filled). A PDF with no fillable form returns count 0. Read-only: the PDF is fetched but never modified. Call this FIRST when filling an unfamiliar PDF, since pdf_fill rejects unknown field names and over-length values.
pdf_fillFill AcroForm form fields in a PDF and return the result. Field names must exist in the PDF (use pdf_inspect first). All values are strings; checkboxes take "true"/"false"; dropdown/radio/optionlist values must be one of the field's options; text values must respect the field's maxLength from pdf_inspect. The source PDF is never modified. Returns the filled PDF inline as an application/pdf resource. Encrypted PDFs are rejected with decrypt advice (common for government blanks with an empty user password).
pdf_mergeMerge two or more PDFs into one, in the order given, and return the result. Sources are read only and never modified. Returns the merged PDF inline as an application/pdf resource. This tool only concatenates whole documents: it does not reorder, rotate or delete pages within them, and it does not fill forms — use pdf_fill for a fillable form and pdf_invoice to build a document from data. An unreadable or rejected input fails with an error, so a partial merge is never returned.
pdf_invoiceGenerate a complete, professionally laid-out invoice PDF from structured data — no template needed. Deterministic: the same input produces byte-identical output (safe to re-run). Note: without a paid PDFops key the output carries a small "Generated with pdfops.dev" footer line. Returns the invoice inline as an application/pdf resource. Use this when you have invoice DATA and no document; if you already have an invoice PDF or a fillable template to populate, use pdf_fill instead.
pdfops_usageCheck the current PDFops API quota for the configured key: tier, limit, used, remaining, the billing period, and the reset timestamp. Read-only and safe to call before a batch to confirm there is headroom. Uses the API key this connection authenticated with.