Home / MCP registry index / io.usefulapi/orb
Orb MCP by usefulapi
io.usefulapi/orb in the official MCP registry.
Endpoint https://orb.usefulapi.io/mcp. Source: github.com/m190/usefulapi-mcp.
The registry describes it as: Read Orb customers, subscriptions, invoices, usage and costs; create or update customers.
We read its 26 tools on 2026-10-26. Nothing in them matched our tool-poisoning rules. It also sets server instructions, text a client puts in front of the model on connect; those were read too.
A clean read means these rules found nothing, not that the server is harmless. A server can change its tools at any time, which is why the index reads it again every week.
Tools it advertises
orb_ping orb_list_customers orb_get_customer orb_get_customer_by_external_id orb_get_customer_costs orb_get_customer_credits orb_get_customer_credits_ledger orb_list_plans orb_get_plan orb_list_subscriptions orb_get_subscription orb_get_subscription_costs orb_get_subscription_usage orb_get_subscription_schedule orb_list_invoices orb_get_invoice orb_get_upcoming_invoice orb_list_items orb_get_item orb_list_prices orb_get_price orb_list_metrics orb_list_coupons orb_list_alerts orb_create_customer orb_update_customer
Run this server? Show the check in your README
The badge reflects the latest weekly read: 
[](https://lazaretto.dev/mcp-registry/io-usefulapi-orb)How this was checked
Lazaretto connects to the endpoint the way any MCP client does, asks the server to introduce itself and list its tools, and reads every name, description, parameter schema and server instruction for tool poisoning: hidden directive blocks, orders to read local secrets, parameters built to carry secrets or the conversation out, orders that redirect another server's tools, and invisible characters. It never calls a tool. What we found across the registry.
To run the same check every time Claude Code adds a server, install the free lazaretto-guard plugin. Browse every server in the index.