Chat, web search, page reading and market data; owner-set daily and per-request key limits (USDC).
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app.singitai/singit is an MCP server that chat, web search, page reading and market data; owner-set daily and per-request key limits (USDC). Its tool list has not been published yet over http, requires no API key, and scores 62/100 on MCPpedia's security, maintenance and efficiency rubric.
Config is the same across clients - only the file and path differ.
{
"mcpServers": {
"app-singitai-singit": {
"args": [
"-y",
"@singitai/plugin-singit"
],
"command": "npx"
}
}
}Are you the author?
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Chat, web search, page reading and market data; owner-set daily and per-request key limits (USDC).
This server supports HTTP transport. Be the first to test it - help the community know if it works.
Five weighted categories - click any category to see the underlying evidence.
No known CVEs.
Checked @singitai/plugin-singit against OSV.dev.
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Give an agent SingIt tools with an MCP key with limits your owner sets: a daily limit, a per-request limit and an expiry, signed by the owner's wallet.
SingIt runs a remote MCP server. There is nothing to install and no local process: your client connects to one URL.
https://app.singitai.app/mcp
Streamable HTTP, JSON responses only (no SSE, no sessions). MCP Registry name: app.singitai/singit.
Server singit "SingIt x402", version 0.1.5 once deployed (the live server reports 0.1.3 until then); protocol 2025-06-18.
Configuration examples, not run live. The chat tools require the gateway deployment of 0.1.5.
Add the server without a key:
claude mcp add --transport http --scope user singit https://app.singitai.app/mcp
claude mcp list
The list should show singit: https://app.singitai.app/mcp (HTTP) - ✔ Connected.
Ask: "Use the SingIt chat_free tool to explain x402 in two sentences."
Free, no key, short answers (up to 400 tokens), using free/deepseek-v4.1-flash by default.
The result includes billing.remainingToday and billing.resetsAt. A small daily allowance
is counted per network, and a shared daily budget can run out. The result also hints to
drop the free/ prefix to pay with chat.
For paid answers, create an MCP key with limits, then export it before starting Claude Code and replace the keyless configuration:
export SINGIT_API_KEY=sk_singit_...
claude mcp remove singit --scope user
claude mcp add --transport http --scope user singit https://app.singitai.app/mcp --header 'Authorization: Bearer ${SINGIT_API_KEY}'
Ask: "Use the SingIt chat tool to explain x402 in detail." Then use get_limits to
check the remaining budget and get_receipts to check the charge.
See the Claude Code guide.
Claude Code (adds the MCP server plus /singit:limits, /singit:receipts and a "price before a paid call" skill):
/plugin marketplace add SingItAi/singit-mcp
/plugin install singit@singit
Codex (adds the MCP server with your key, plus the singit-limits, singit-receipts and price-before-paid-call skills). It needs
an MCP key with limits in SINGIT_API_KEY before Codex starts: Codex does not start the server when the
variable is unset (we checked), so for the free tools without a key use codex mcp add singit --url https://app.singitai.app/mcp instead.
export SINGIT_API_KEY=... # your MCP key
codex plugin marketplace add SingItAi/singit-mcp
codex plugin add singit@singit
The Claude Code plugin works without a key (free tools, chat_free; it only warns about the unset variable). For paid tools and
your limits, create an MCP key with limits and export SINGIT_API_KEY in the environment that starts the
client; the plugins read it from there a