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Registrai Arc data MCP Server

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Registrai Arc data is answering right now. Last checked 1 min ago. It exposes 11 tools.

Read-only hourly data on stablecoin apps on Arc: payments, volume, indices, verified builders.

Uptime history 18 days of history · worst day 99%
18 days agonow
100.0%
Uptime 24h
92 of 92 checks
11
Tools
read from the server
233 ms
Response time
average over 24h
open, no key
Access
streamable-http

What changed 19

Every tool that appeared, vanished or quietly changed what it asks for. Recorded since 17 October 2026. No other catalogue keeps this.

26 Oct a tool changed the parameters it asks for arc_ecosystem
23 Oct 6 tools disappeared arc_app_history_deep, arc_contract, arc_events and 3 more
22 Oct a tool appeared arc_apps_week
20 Oct 3 tools appeared arc_ecosystem, arc_entity, arc_numbers
19 Oct a tool description was rewritten arc_apps
17 Oct 7 tool descriptions were rewritten arc_app, arc_app_history, arc_apps and 4 more

Registrai Arc data missed one check this week

Everything else answered, so this is steady rather than shaky. We check every 15 minutes, which is how a one-off gets told apart from the start of a pattern, and how you hear about the next one within the hour instead of from your users.

Three servers free · no card

Connect this server

Endpoint below is the one we actually reach during checks — not the one copied from a README. Last verified 1 min ago.

run in your terminal
claude mcp add arc-data --transport http https://builder.registrai.cc/api/mcp
Settings → Connectors → Add custom connector, then paste this address
https://builder.registrai.cc/api/mcp
~/.codex/config.toml
[mcp_servers.arc-data]
url = "https://builder.registrai.cc/api/mcp"
.cursor/mcp.json
{
  "mcpServers": {
    "arc-data": {
      "url": "https://builder.registrai.cc/api/mcp"
    }
  }
}
.vscode/mcp.json
{
  "servers": {
    "arc-data": {
      "type": "http",
      "url": "https://builder.registrai.cc/api/mcp"
    }
  }
}

Available tools 11

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

arc
arc_app
One Arc app by id (e.g. domain:archery.wtf, integration:uniswap; ids come from arc_apps): last 24 h, contracts count, verified status and the last 7 days of hourly rows.
arc_app_history
One Arc app's hourly points and activity (payments, paying wallets, new payers, USD) in one index, oldest first.
arc_apps
Every app on Arc in the indices with its last 24 h of stablecoin payments (USDC, EURC) and USD volume, verified status and first-seen hour. Use this when asked which apps use USDC on Arc, or which are most used. Not for token prices, DeFi TVL or chains other than Arc.
arc_apps_week
Apps on Arc ranked by stablecoin payments received in the last 7 days (USD, payments, new paying wallets) and the hour each was first seen in Registrai's index. Use this when asked which apps on Arc are most used, which accept USDC, or what is new on Arc.
arc_ecosystem
Every project in the Arc ecosystem directory (apps, wallets, exchanges, banks, infrastructure, partners) with category and status: live on mainnet, deployed or announced. Use this when asked what exists on Arc, which projects are in a category, or whether a company is on Arc. Not for token prices.
arc_entity
One project in the Arc ecosystem directory by slug (slugs come from arc_ecosystem): summary, status with evidence, links, contracts on Arc and sources.
arc_index_history
Hourly closes of one Arc index, oldest first (at most 744 hours per call). Use this for charts or changes over a window of up to 31 days.
arc_indices
Latest hourly close of the Arc Builders, Integrations and Ecosystem indices (ABI, AII, AEI), their 24 h change base and decay parameters. Use this when asked how Arc app activity is trending overall.
arc_new_apps
Arc apps first seen in an index after a given hour. Use this when asked what is new on Arc.
arc_numbers
Chain-level Arc numbers: USDC and EURC supply, all stablecoins and TVL (from DefiLlama), estimated 24 h stablecoin volume, apps and projects, index closes and a dated timeline, each with its source and date. Use this when asked how big Arc is, how much USDC is on Arc, or Arc's TVL or volume.
arc_verified
Arc projects whose builder proof validates against the Arc mainnet builder registry.

Tools removed

Tools this server used to expose. Anything built against them stopped working on the day they went.

arc_app_history_deep
removed 23 Oct 2026
arc_contract
removed 23 Oct 2026
arc_events
removed 23 Oct 2026
arc_index_history_deep
removed 23 Oct 2026
arc_members_day
removed 23 Oct 2026
arc_project_scope
removed 23 Oct 2026

Endpoints

URLTransportStateLatencyChecked
https://builder.registrai.cc/api/mcp streamable-http answering 118 ms 1 min ago

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Registrai Arc data — questions

Answers built from our own checks of this server.

What can Registrai Arc data do?
It exposes 11 tools, read directly from the server on our last check. Among them: arc_app, arc_app_history, arc_apps, arc_apps_week, arc_ecosystem, arc_entity and 5 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 Registrai Arc data working right now?
We send a real MCP handshake every 15 minutes. Over the last 24 hours 92 of 92 checks got a reply (100.0%), average response time 233 ms. The bar chart above shows every period we have measured.
Did Registrai Arc data ever remove tools?
Yes. arc_app_history_deep, arc_contract, arc_events, arc_index_history_deep and 2 more are no longer exposed — we recorded the date each one disappeared. A tool vanishing usually means a breaking change for anything that depended on it.
How do I connect Registrai Arc data?
Copy the ready config from this page. We generate it for Claude Code, Claude Desktop, Codex, Cursor and VS Code, each in the form that client actually reads. It is a remote server, so there is nothing to install — the client connects to the address.
Does Registrai Arc data need an API key?
No. Registrai Arc data completed a full MCP handshake with us as an anonymous client and listed its tools without asking for anything. All 11 of them are readable on this page. This is what we observed, not what the docs claim.
How fast is Registrai Arc data?
It answers our handshake in 233 ms on average, which is faster than 61% of all working MCP servers we measure. The comparison comes from our own checks across the whole registry, every 15 minutes.