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com.corenexis/api

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What is the Corenexis API?

The Corenexis API Platform is a set of production REST APIs for documents, images and data quality. One key, one header, predictable JSON - and a free tier on every API. The same APIs are available to AI assistants through a remote MCP server, so ChatGPT, Claude, n8n or your own agent can generate a PDF, read a scanned receipt or validate an email in the middle of a conversation.

REST API

https://api.corenexis.com/<api>/v1 - header x-api-key

MCP server

https://api.corenexis.com/mcp/server - Streamable HTTP, API key

Registry name

com.corenexis/api on the Official MCP Registry

n8n

Community node in Core-Nexis/n8n-nodes-corenexis-api

Dashboard

https://dash.corenexis.com - keys, subscriptions, usage

Related MCP server: agentforge

APIs

API

Endpoint

What it does

Docs

Markdown to PDF

POST /markdown-to-pdf/v1

Markdown into a print-ready PDF or page images

docs

HTML to PDF

POST /html-to-pdf/v1

HTML and CSS rendered by a real browser engine into a PDF or screenshot

docs

Image to Text (OCR)

/image-ocr/v1

Text out of photos, screenshots, scans and receipts

docs

PDF to Text (OCR)

/pdf-to-text/v1

Text from PDFs, scanned pages included, as a background job

docs

Email Validator

/email-validator/v1

Syntax, domain, mailbox and risk checks

docs

Disposable Email Detector

/disposable-email-validator/v1

Tell a throwaway address from a real one

docs

Image Conversion

/image-conversion/v1

Convert, resize and compress images

docs

Image CDN

/image-cdn/v3

Host an image and get a fast delivery link

docs

QR Code and Barcode

/qr-barcode/v1

QR, UPI QR, Code128, EAN-13 and UPC-A codes

docs

Every request and response example: docs/apis.md.

Quick start

  1. Sign up at https://dash.corenexis.com/auth/signup and create a key at https://dash.corenexis.com/api-keys.

  2. Subscribe to the APIs you need (each has a free tier). One key works for all of them.

  3. Call an API:

curl -X POST https://api.corenexis.com/email-validator/v1 \
  -H "x-api-key: your_api_key" \
  -H "Content-Type: application/json" \
  -d '{"email": "john.doe@company.com"}'

MCP server

Point any MCP client at https://api.corenexis.com/mcp/server with your key in x-api-key.

{
  "mcpServers": {
    "corenexis": {
      "type": "http",
      "url": "https://api.corenexis.com/mcp/server",
      "headers": { "x-api-key": "your_api_key" }
    }
  }
}
claude mcp add --transport http corenexis https://api.corenexis.com/mcp/server \
  --header "x-api-key: your_api_key"

MCP Client node: connection HTTP Streamable, endpoint https://api.corenexis.com/mcp/server, authentication Header Auth with name x-api-key and your key as the value.

curl -X POST "https://api.corenexis.com/mcp/server" \
  -H "x-api-key: your_api_key" \
  -H "Content-Type: application/json" \
  -H "Accept: application/json, text/event-stream" \
  -d '{"jsonrpc":"2.0","id":1,"method":"tools/list"}'

Tools

Tool

What it does

Quota

corenexis_list_apis

Every API with its tools, docs and subscribe links

free

corenexis_account

Check the key and the account

free

corenexis_subscriptions

Subscribed APIs with plan, status, renewal and usage

free

corenexis_api_details

One API's plans, features and limits

free

markdown_to_pdf

Markdown to PDF or images, returns a hosted link

1 call

html_to_pdf

HTML and CSS to PDF or image with a browser engine

1 call

image_to_text

OCR of a photo, screenshot or scan from a URL or base64

1 call

pdf_to_text

Start PDF text extraction, returns a job_id

1 call

pdf_to_text_status

Collect a pdf_to_text result

free

email_validate

Full email check: syntax, domain, mailbox, risk

1 call

disposable_email_check

Is the address from a disposable provider

1 call

image_convert

Convert, resize or compress an image, returns a hosted link

1 call

image_cdn_upload

Host an image and get a delivery link

1 call

qr_barcode_generate

QR, UPI QR or barcode image, returns a hosted link

1 call

The MCP server holds no keys of its own: every tool call is the same REST call made with your key and counts against the same quota. Full reference: docs/mcp.md.

Screenshots

Links

Built by Corenexis. This repository holds documentation and examples; the API service is hosted by Corenexis. Examples are released under the MIT License.

This server cannot be deployed

Shareable, User-Owned Context BackendPeople, applications, and agents read, write, and coordinate together in one context lake. Reach it over MCP, a CLI, a Python SDK, or REST.fulcradynamics.comAd

Maintenance

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Resources

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