Proofetch

io.github.Vektoris-AIv0.0.2更新于 Sep 29, 2026

Verified extraction: source-backed JSON from PDFs/URLs; honest null + signed receipt.

已验证Streamable HTTP可网页运行Other

安装

在 SourceWeft 中

  1. 打开 控制台中的 Proofetch，将其添加到工作区。
  2. 为需要使用其工具的对话启用该服务。

Web executable，通过 Streamable HTTP。 远程服务在工作区中配置后即可从网页运行时运行。

其他 MCP 客户端

把它添加到你客户端的 mcpServers 配置中。

{
  "mcpServers": {
    "proofetch": {
      "type": "http",
      "url": "https://proofetch-vektoris-ai-workflows.vercel.app/mcp"
    }
  }
}

README

proofetch — verified extraction with proof per field

Structured data from PDFs and web pages, where every value is backed by an exact source quote — or honestly left null. Never guessed. Each result ships with a cryptographically signed receipt you can verify yourself.

proofetch is a hosted MCP server and HTTP API built for developers and AI agents. You pay only for fields that pass the proof — €0.02 per verified field. Empty or unprovable fields cost nothing.

  • 🔗 Landing page & pricing: https://vektoris.de/proofetch
  • 🤖 MCP endpoint (remote): https://proofetch-vektoris-ai-workflows.vercel.app/mcp
  • 🧾 Listed in the official MCP registry: io.github.Vektoris-AI/proofetch

This repository is the public connector & documentation for the hosted proofetch service. The extraction pipeline itself is operated as a service — you don't self-host it, you call it with an API key.

Why proofetch

Normal extraction fills every field — even when the value is invented. You then have to re-check every number by hand. proofetch is different:

  • Never guesses. Unsure? The field is null + flagged, instead of a fabricated value.
  • Provenance per field. Every value comes with the exact source quote, verifiable against the original document.
  • Signed receipt. The result is sealed in a signed receipt (Ed25519) — you, or an escrow, verify it without having to trust us.
  • Pay for truth only. Billing is per field that passes the proof (verdict: PASS).

Get an API key

Buy prepaid balance (from €5) on the landing page — you get your key instantly after payment:

👉 https://vektoris.de/proofetch#preise

Quickstart — HTTP API

bash
curl -X POST https://proofetch-vektoris-ai-workflows.vercel.app/extract \  -H "Authorization: Bearer YOUR_API_KEY" \  -H "Content-Type: application/json" \  -d '{    "source": { "type": "pdf_url", "value": "https://example.com/invoice.pdf" },    "targetSchema": {      "type": "object",      "properties": {        "invoice_total": { "type": "string" },        "due_date":      { "type": "string" },        "invoice_number":{ "type": "string" }      },      "additionalProperties": false    }  }'

Source types (source.type): pdf_url, pdf_base64, url, text, html. targetSchema is a standard JSON Schema (type: "object", properties, additionalProperties: false).

What you get back

jsonc
{  "data": {    "invoice_total": "1,190.00 EUR",    "due_date": "2024-09-30",    "invoice_number": null          // honest null — not found in source  },  "fields": [    { "path": "invoice_total", "value": "1,190.00 EUR", "verdict": "PASS",      "provenance": { "quote": "1,190.00 EUR", "start": 43, "end": 55 } },    { "path": "invoice_number", "value": null, "verdict": "FAIL", "provenance": null }  ],  "verdict": "PARTIAL",  "receipt": { "v": 1, "jobId": "pf_…", "outputHash": "sha256:…" },  "billing": { "charged": true, "amountCents": 4 }}
  • data — clean JSON, each field proven or honestly null
  • fields[] — per field: source quote (provenance) + verdict (PASS/FAIL)
  • verdict — overall: PASS, PARTIAL, or FAIL
  • receipt — signed proof with hashes, self-verifiable

Check your balance any time: GET /billing/balance with the same key.

Use as an MCP server (remote)

proofetch speaks the Model Context Protocol over Streamable HTTP. Point any MCP-capable client at the remote endpoint with your key as a bearer token.

Endpoint: https://proofetch-vektoris-ai-workflows.vercel.app/mcp Auth: Authorization: Bearer YOUR_API_KEY Tool: verified_extract — same contract as the HTTP API above.

Example client config (generic MCP streamable-http remote):

json
{  "mcpServers": {    "proofetch": {      "type": "streamable-http",      "url": "https://proofetch-vektoris-ai-workflows.vercel.app/mcp",      "headers": { "Authorization": "Bearer YOUR_API_KEY" }    }  }}

Open standards

proofetch is built for autonomous agents: discoverable via the A2A card and MCP, payable per call via x402 / AP2, and every receipt is independently verifiable.

Links

© Vektoris. The proofetch service and pipeline are proprietary; this connector/documentation is provided under the MIT License (see LICENSE).

来源：README.md，提交 52ce974

工具

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版本历史

1
  1. v0.0.2最新Sep 16, 2026