Mercoa MCP Server

by usefulapi Your server? Claim it

answering

Mercoa is answering right now. Last checked 10 min ago. It exposes 17 tools. Last commit 1 Sep 2026.

Query and manage Mercoa AP/AR bill-pay: entities, invoices, transactions and payment methods.

Uptime history 47 days of history · worst day 20%

47 days agonow

100.0%

Uptime 24h

91 of 91 checks

Tools

read from the server

181 ms

Response time

average over 24h

Stars

last commit 1 Sep 2026

Nothing serious here today

Today is the operative word: we check Mercoa every 15 minutes and re-read its code on every release. Watch it and you find out the day that stops being true.

Connect this server

Endpoint below is the one we actually reach during checks — not the one copied from a README. Last verified 10 min ago.

Claude Code Claude Desktop Codex Cursor VS Code

run in your terminal

claude mcp add mercoa --transport http https://mercoa.usefulapi.io/mcp

~/Library/Application Support/Claude/claude_desktop_config.json

{
  "mcpServers": {
    "mercoa": {
      "url": "https://mercoa.usefulapi.io/mcp"
    }
  }
}

~/.codex/config.toml

[mcp_servers.mercoa]
url = "https://mercoa.usefulapi.io/mcp"

.cursor/mcp.json

{
  "mcpServers": {
    "mercoa": {
      "url": "https://mercoa.usefulapi.io/mcp"
    }
  }
}

.vscode/mcp.json

{
  "mcpServers": {
    "mercoa": {
      "url": "https://mercoa.usefulapi.io/mcp"
    }
  }
}

Available tools 17

Read directly from the server with tools/list, grouped by what they act on. If a tool disappears, we record the date.

mercoa

mercoa_add_invoice_comment

WRITE — adds a comment to an invoice (visible in its activity log). POST /invoice/{invoiceId}/comment.

mercoa_create_entity

WRITE — creates a real entity (customer/vendor/payor/payee) in Mercoa. Supply role flags, accountType, and a nested `profile` object (business or individual details). POST /entity.

mercoa_create_invoice

WRITE — creates a real invoice/bill in Mercoa. Set status (DRAFT to stage, NEW to submit), amount, currency, payer/vendor, dates and line items. POST /invoice.

mercoa_find_entities

Find/search entities (buyers, vendors, payors, payees). Use to look up counterparties by name/email/foreignId or list all. GET /entity.

mercoa_find_invoices

Find/search invoices (bills) across payers and vendors. Filter by status, entity, date, approver and more. GET /invoices (plural list endpoint).

mercoa_find_transactions

List/search payment transactions. Filter by entity, invoice, status, type and date. GET /transactions.

mercoa_get_entity

Get a single entity by ID (or foreign ID). GET /entity/{entityId}.

mercoa_get_entity_events

Get the event/audit log for an entity. GET /entity/{entityId}/events.

mercoa_get_entity_invoice_metrics

Get aggregate invoice metrics (totals/counts, grouped by currency) for an entity's payables/receivables — for AP/AR dashboards and aging. GET /entity/{entityId}/invoice-metrics.

mercoa_get_invoice

Get a single invoice (bill) by ID. GET /invoice/{invoiceId}.

mercoa_get_invoice_events

Get the event/audit log for an invoice (status changes, approvals, payments). GET /invoice/{invoiceId}/events.

mercoa_get_organization

Get the caller's Mercoa organization configuration (settings, payment methods enabled, etc.). GET /organization.

mercoa_get_payment_method

Get a single payment method for an entity. GET /entity/{entityId}/paymentMethod/{paymentMethodId}.

mercoa_get_transaction

Get a single payment transaction by ID. GET /transaction/{transactionId}.

mercoa_list_entity_payment_methods

List an entity's payment methods (bank accounts, cards, check, etc.). GET /entity/{entityId}/paymentMethods.

mercoa_list_entity_users

List the users belonging to an entity (approvers, admins, etc.). GET /entity/{entityId}/users.

mercoa_update_invoice

WRITE — updates an existing invoice/bill (all fields optional). Commonly used to advance status (e.g. DRAFT→NEW→SCHEDULED) or change amounts, dates, or payment methods. POST /invoice/{invoiceId}.

Endpoints

URL	Transport	State	Latency	Checked
https://mercoa.usefulapi.io/mcp	streamable-http	answering	202 ms	10 min ago

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Mercoa — questions

Answers built from our own checks of this server.

What can Mercoa do?

It exposes 17 tools, read directly from the server on our last check. Among them: mercoa_add_invoice_comment, mercoa_create_entity, mercoa_create_invoice, mercoa_find_entities, mercoa_find_invoices, mercoa_find_transactions and 11 more. The full list with descriptions is on this page — we take it from the server itself via tools/list, not from a README. How MCP servers expose tools in the first place →

Is Mercoa working right now?

We send a real MCP handshake every 15 minutes. Over the last 24 hours 91 of 91 checks got a reply (100.0%), average response time 181 ms. The bar chart above shows every period we have measured.

How do I connect Mercoa?

Copy the ready config from this page — we generate it for Claude Code, Claude Desktop, Codex, Cursor and VS Code, each with the file path that client actually reads. It is a remote server, so there is nothing to install — the client connects to the address.

Does Mercoa need an API key?

No. Mercoa completed a full MCP handshake with us as an anonymous client and listed its tools without asking for anything. All 17 of them are readable on this page. This is what we observed, not what the docs claim.

How fast is Mercoa?

It answers our handshake in 181 ms on average, which is faster than 70% of all working MCP servers we measure. The comparison comes from our own checks across the whole registry, every 15 minutes.

Is Mercoa open source?

Yes — it is published under the MIT licence, written in JavaScript and 0 stars on GitHub. The source link is on this page, so you can read exactly what it does with your data before you connect it.