write-pdf-metadata
Add or modify metadata like title, author, and keywords in PDF files using URL or base64 input to organize and categorize documents.
Instructions
Write metadata to PDF files.
Input Schema
TableJSON Schema
| Name | Required | Description | Default |
|---|---|---|---|
| inputMethod | Yes | Input method | |
| files | Yes | Array of URLs or base64-encoded PDFs | |
| metadata | Yes | Metadata to write |
Implementation Reference
- src/index.ts:838-852 (handler)The handler function that implements the tool logic by proxying requests to the external Dumpling AI API endpoint for writing PDF metadata.
async ({ inputMethod, files, metadata }) => { const apiKey = process.env.DUMPLING_API_KEY; if (!apiKey) throw new Error("DUMPLING_API_KEY not set"); const response = await fetch(`${NWS_API_BASE}/api/v1/write-pdf-metadata`, { method: "POST", headers: { "Content-Type": "application/json", Authorization: `Bearer ${apiKey}`, }, body: JSON.stringify({ inputMethod, files, metadata }), }); if (!response.ok) throw new Error(`Failed: ${response.status} ${await response.text()}`); const data = await response.json(); return { content: [{ type: "text", text: JSON.stringify(data, null, 2) }] }; - src/index.ts:824-837 (schema)Input schema defined using Zod for validating the tool parameters: inputMethod, files, and metadata object.
{ inputMethod: z.enum(["url", "base64"]).describe("Input method"), files: z.array(z.string()).describe("Array of URLs or base64-encoded PDFs"), metadata: z .object({ Title: z.string().optional(), Author: z.string().optional(), Subject: z.string().optional(), Keywords: z.string().optional(), Creator: z.string().optional(), Producer: z.string().optional(), }) .describe("Metadata to write"), }, - src/index.ts:821-854 (registration)The server.tool call that registers the 'write-pdf-metadata' tool with MCP server, including name, description, schema, and handler.
server.tool( "write-pdf-metadata", "Write metadata to PDF files.", { inputMethod: z.enum(["url", "base64"]).describe("Input method"), files: z.array(z.string()).describe("Array of URLs or base64-encoded PDFs"), metadata: z .object({ Title: z.string().optional(), Author: z.string().optional(), Subject: z.string().optional(), Keywords: z.string().optional(), Creator: z.string().optional(), Producer: z.string().optional(), }) .describe("Metadata to write"), }, async ({ inputMethod, files, metadata }) => { const apiKey = process.env.DUMPLING_API_KEY; if (!apiKey) throw new Error("DUMPLING_API_KEY not set"); const response = await fetch(`${NWS_API_BASE}/api/v1/write-pdf-metadata`, { method: "POST", headers: { "Content-Type": "application/json", Authorization: `Bearer ${apiKey}`, }, body: JSON.stringify({ inputMethod, files, metadata }), }); if (!response.ok) throw new Error(`Failed: ${response.status} ${await response.text()}`); const data = await response.json(); return { content: [{ type: "text", text: JSON.stringify(data, null, 2) }] }; } );