Agent-Native Calendar
by BuilderIO
Agent-Native Google Calendar - manage events, sync, and public booking
Runs in the cloud★ 7,620MITUpdated 2 months ago
Install
eContract
Overview
Description from the maker (original English)
Send contracts for e-signature, track signing, get signed PDFs and audit trails, verify any PDF.
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 checksi2 of 3 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: Docs, sheets & office work
Install
Pick the AI app you use, then copy the settings.
Before you install
- Basic checks: 2 of 3 passed
- Runs on the maker’s server: what you ask it goes through their server.
- The registry lists no key to fill in.
You need
- Runs in the cloudNothing to install; it connects over the internet
Which app do you use?
Pick your app above. We remember it, so next time the button says “Install in …”.
Works in Claude on the web, desktop and mobile:
- Open Settings → Connectors
- Press Add custom connector
- Paste the address below and press Add
- If it asks you to sign in, sign in with the maker
https://api.econtract.online/mcpRun this in your terminal
claude mcp add --transport http econtract https://api.econtract.online/mcpOr copy the settings yourself
Paste into .cursor/mcp.json in your project, or ~/.cursor/mcp.json
{
"mcpServers": {
"econtract": {
"url": "https://api.econtract.online/mcp"
}
}
}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.
Or copy the settings yourself
Paste into .vscode/mcp.json in your project
{
"servers": {
"econtract": {
"type": "http",
"url": "https://api.econtract.online/mcp"
}
}
}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.
ChatGPT connects only to servers on the internet:
- Open ChatGPT on the web → Settings → Connectors (Apps)
- Press Create or Add (some plans need Developer mode under Advanced first)
- Paste the address below, give it a name and save
- If it asks you to sign in, sign in with the maker
https://api.econtract.online/mcpMenu names can differ slightly by plan and over time.
Your choice stays on this device in a cookie; no account needed.
These settings are generated from the maker’s registry entry. If the README says otherwise, follow the README.
What it can do
The server asks you to sign in before it lists its tools.
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 7, 2026
- ! Caution
Maker matches the repo
The publisher (econtract.online) is not the repo owner (contractlayer); someone else may have listed it
- … 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
- ✓ Pass
Endpoint responds
Responded in 900 ms (HTTP 401)
- ✓ Pass
Sign-in with OAuth
Declares OAuth sign-in, so your AI app can take you to log in
- … 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 Docs, sheets & office worki
- More stars than 0% of the other 3533 servers in this category
- Published to the registry more recently than 61% of the other 3533 servers in this category
- Basic checks equal to or better than 38% of the other 3533 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 eContract safe?
It passed 2 of 3 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?
The registry does not list a required key, though some servers ask you to sign in on first use.
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 21 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: Agent-Native Calendar, Excel MCP Server, MCP Server for Excel
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
Excel MCP Server
by haris-musa
Lets AI create and edit Excel files itself, including formulas, charts and PivotTables, without Excel installed.
Runs on your computer★ 4,276MITUpdated 7 days ago
Install
MCP Server for Excel
by sbroenne
Excel automation for AI - Sheets, Power Query, DAX, VBA, Tables, Ranges and more. Windows only.
Runs on your computer★ 847MITUpdated 4 days 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.
ContractLayer
Contract infrastructure for developers and AI agents, by eContract.
Let an AI agent prepare a contract, send it for e-signature, follow up and archive the signed PDF, while every signature stays with a real person.
MCP server
https://api.econtract.online/mcpStreamable HTTP. Sign in with your eContract account (OAuth 2.1) or send an API key as Authorization: Bearer cl_live_…. Listed in the official MCP Registry as online.econtract/mcp (server.json).
| Tool | What it does |
|---|---|
send_contract | Create a contract from a PDF/DOCX (inline, link or template) and send it to the signers, in order or in parallel; place each signature next to a text with signatureAnchor |
list_contracts, get_contract | What is waiting, who has signed, what comes next |
get_signing_links, send_reminder, void_contract | Share personal signing links, chase signers, cancel |
download_signed_document, get_audit_trail | The signed PDF and the signing evidence |
verify_pdf | Check the digital signatures in any PDF |
list_templates, get_template, analyze_contract | Templates and an AI summary of a contract |
Agents can prepare, send and follow up, but they can never sign or decline for someone: each signer signs through their own link.
Connect your client
Configs and steps for each client are in mcp/: Claude, Claude Code, ChatGPT, Codex, Cursor, VS Code, Gemini CLI, Muse Code, OpenClaw, Hermes Agent.
Repositories
| Repository | What it is |
|---|---|
| verify-pdf | Verify the digital signatures in any PDF with one API call, no API key |
| contract-manager | REST API examples (Node.js, Python): send a contract, place signatures, share links, download the signed PDF and audit trail |
| claude-agent-contracts | A contract-signing agent built with the Claude Agent SDK: plain-language requests, eContract tools only, no cancelling unless allowed |
More examples (agent SDKs, workflow tools) are added alongside the guides on the eContract blog.
Links
- eContract: free e-signatures with PAdES signatures, RFC 3161 timestamps and a hash-chained audit trail
- Developer docs and MCP reference
- OpenAPI document
- Verify a signed PDF
License
MIT