CoreNexis API

Name: CoreNexis API
Author: Core-Nexis

by Core-Nexisversion 1.0.1i★ –iRuns in the cloud

Registry namecom.corenexis/api

Install

Overview

Description from the maker (original English)

PDF from HTML or Markdown, OCR, email validation, image conversion and hosting, QR and barcodes.

PopNx MCP’s three pillars

These three are never merged into one score: opinions, measurements and popularity are different things.

User voiceiNo reviews yetReviews open together with accounts in a later step
Our basic checksi1 of 1 passedChecked from public information; code not scanned yet
UsageiNot measured yet★ –

What you can do with it

We have not written a plain-language summary for this one yet. Below are the facts we read from the registry.

Connection: Runs in the cloud
Transport: Streamable HTTP
Category: Chat & email
You need to fill in: x-api-key

Install

Pick the AI app you use, then copy the settings.

Before you install

Basic checks: 1 of 1 passed
Runs on the maker’s server: what you ask it goes through their server.
You fill in yourself: x-api-key

Values marked secret are keys to your account. Never share them or paste them into a chat.

You need

Runs in the cloudNothing to install; it connects over the internet

Which app do you use?

ClaudeClaude CodeCursorVS CodeChatGPT

Pick your app above. We remember it, so next time the button says “Install in …”.

This address needs a key in a request header, which the add-connector menu cannot set. Use Claude Code, Cursor or VS Code instead.

Run this in your terminal

claude mcp add --transport http api https://api.corenexis.com/mcp/server --header 'x-api-key: your-value'

Fill in the empty values before running it.

Open in Cursor

Or copy the settings yourself

Paste into .cursor/mcp.json in your project, or ~/.cursor/mcp.json

{
  "mcpServers": {
    "api": {
      "url": "https://api.corenexis.com/mcp/server",
      "headers": {
        "x-api-key": "your-value"
      }
    }
  }
}

Your browser asks to open the app, then the app shows the settings and asks you to confirm. Key values are left empty for you to fill in.

Open in VS Code

Or copy the settings yourself

Paste into .vscode/mcp.json in your project

{
  "servers": {
    "api": {
      "type": "http",
      "url": "https://api.corenexis.com/mcp/server",
      "headers": {
        "x-api-key": "your-value"
      }
    }
  }
}

Your browser asks to open the app, then the app shows the settings and asks you to confirm. Key values are left empty for you to fill in.

This address needs a key in a request header, which the add-connector menu cannot set. Use Claude Code, Cursor or VS Code instead.

Your choice stays on this device in a cookie; no account needed.

Values you fill in

x-api-key secret required HTTP header
Your CoreNexis API key from dash.corenexis.com

These settings are generated from the maker’s registry entry. If the README says otherwise, follow the README.

What it can do

We have not read this server’s tool list yet; we check endpoints in rotation.

Basic checksi

We check information anyone can see; we have not read the code. Checks that do not apply are left out of the count. · Checked Nov 6, 2026

✓ Pass
Maker matches the repo
The registry name was verified against the domain corenexis.com (the registry checks domain ownership)
… Not checked yet
Still maintained
We have not read this repo from GitHub yet
… Not checked yet
Has a licence
We have not read this repo from GitHub yet
… Not checked yet
Endpoint responds
Not checked yet; we check endpoints in rotation
… Not checked yet
Sign-in with OAuth
Not checked yet; we check endpoints in rotation
… Not checked yet
No hidden instructions in tool descriptions
Not checked yet; we read the tool list when we check the endpoint

Compared with others in Chat & emaili

More stars than 0% of the other 1766 servers in this category
Published to the registry more recently than 64% of the other 1766 servers in this category
Basic checks equal to or better than 100% of the other 1766 servers in this category

Compared with every active server in this category in the registry. Stars count only when the publisher owns the repo.

Common questions

Is CoreNexis API safe?

It passed 1 of 1 applicable basic checks. We have not read the code. Before adding a key or token, see what access the server asks for and use a key with only the permissions you need.

What keys or codes does it need?

You need to fill in: x-api-key

Does it run on my computer or in the cloud?

It runs in the maker’s cloud. Connect over the internet with nothing to install, but what you send passes through the maker’s servers.

Is it still maintained?

The GitHub repo last changed –, and the latest version (1.0.1) reached the registry 16 days ago.

Which apps can use it?

Apps that support MCP, such as Claude Desktop, Claude Code, Cursor and VS Code. It connects by URL, so apps that accept remote MCP servers work too, such as ChatGPT in developer mode.

What can I use instead?

In the same category: Vexa, emailmd, MCP WhatsApp Cloud

Alternatives

Servers in the same category from other makers, sorted by stars.

Reading a card:★ GitHub starsiThree pillars: reviews · checks · usageiUpdated = latest version published to the registryi

Vexa

by Vexa-ai

Meeting bot and transcripts for Google Meet, Teams and Zoom. Live or after, speakers labelled.

Runs in the cloud★ 2,949Apache-2.0Updated 2 months ago

Install

emailmd

by anypost

Render markdown into email-safe HTML, lint drafts for deliverability problems, and preview emails.

Computer or cloud★ 1,385MITUpdated 31 days ago

Install

MCP WhatsApp Cloud

by codespar

MCP server for WhatsApp Cloud API (Meta) — messages, media, and templates via Graph API

Runs on your computer★ 277MITUpdated 5 months ago

Install

README from the maker

Open the README

Copied from the maker’s repo as written. PopNx MCP has not reviewed or endorsed it. HTML, images and scripts are removed. Links lead off this site.

Corenexis API and MCP Server

9+ production REST APIs behind one API key, plus a remote MCP server so AI agents can use them.

PDF generation, OCR, email validation, image conversion, image CDN and QR codes.

Website · MCP guide · Get an API key · MCP Registry

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/ /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

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

Sign up at https://dash.corenexis.com/auth/signup and create a key at https://dash.corenexis.com/api-keys.
Subscribe to the APIs you need (each has a free tier). One key works for all of them.
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.

Claude, Cursor, VS Code and other MCP clients

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

Claude Code

claude mcp add --transport http corenexis https://api.corenexis.com/mcp/server \

--header "x-api-key: your_api_key"

n8n

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

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.

CoreNexis API

Overview

PopNx MCP’s three pillars

What you can do with it

Install

Before you install

Values you fill in

What it can do

Basic checksi

Maker matches the repo

Still maintained

Has a licence

Endpoint responds

Sign-in with OAuth

No hidden instructions in tool descriptions

Compared with others in Chat & emaili

Common questions

Alternatives

Vexa

emailmd

MCP WhatsApp Cloud

README from the maker

What is the Corenexis API?

APIs

Quick start

MCP server

Tools

Screenshots

Links