Read-only MCP server exposing hourly data on stablecoin apps, indices and ecosystem projects on the Arc chain, for trend and usage questions.
What you can do
Read latest index closes and 24 h change for the Arc Builders, Integrations and Ecosystem indices, plus hourly history up to 31 days for charts and window comparisons. List Arc apps with 24 h stablecoin payments (USDC, EURC), USD volume, verified status and first-seen hour, or rank apps by 7-day payments. Fetch one app by id with contract counts, verification and 7 days of hourly rows, or one app's hourly activity in a chosen index. Find newly seen apps after a given hour and projects whose builder proof validates against the Arc mainnet builder registry. Browse the Arc ecosystem directory and look up a single project by slug, and read chain-level numbers such as stablecoin supply, TVL and 7
When to use it
Useful when you need to answer questions about how Arc app activity is trending, which apps accept or receive the most USDC, what is new on Arc, which projects exist in a category, or how large Arc's stablecoin supply, TVL and volume are, without building your own indexer.
Requirements
A remote streamable HTTP endpoint at builder.registrai.cc; no packages, environment variables, headers or authentication are declared. Network access to the endpoint is needed.
Before you install
The data is read-only and no credentials are requested, but figures come from third-party sources such as DefiLlama and Registrai's own index, so treat them as reported rather than authoritative. The server explicitly does not cover token prices, DeFi TVL beyond its stated numbers, or chains other than Arc.
Enable the server for the chats that should use its tools.
Web executable via Streamable HTTP. Remote servers run from the web runtime once configured in a workspace.
Use with an agent
Paste this prompt into Claude Code, Codex, Cursor or another agent — or into SourceWeft chat. The agent reads this server's install guide, shows you its publisher, endpoint and sign-in, and adds it to your client once you agree. Keys never go into a command.
Read https://sourceweft.com/mcp/cc.registrai%2Farc-data/install.md and connect the MCP server it describes to my client. Before changing any config, show me its publisher, endpoint and sign-in method and wait for my OK. Never put an API key in a command or in a file I would commit; ask me where it should come from.
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.
Takes no parameters.
arc_index_history
Arc index: hourly 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.
Parameterstofromindexrequired
arc_apps
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.
Parameterssort
arc_app
Arc app: detail
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.
Parametersidrequired
arc_app_history
Arc app: hourly history
One Arc app's hourly points and activity (payments, paying wallets, new payers, USD) in one index, oldest first.
Parametersidrequiredtofromindexrequired
arc_new_apps
Arc apps: newly seen
Arc apps first seen in an index after a given hour. Use this when asked what is new on Arc.
Parametersindexrequiredsincerequired
arc_verified
Arc builders: verified
Arc projects whose builder proof validates against the Arc mainnet builder registry.
Takes no parameters.
arc_ecosystem
Arc ecosystem: directory
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.
Parametersqstatuscategory
arc_entity
Arc project: detail
One project in the Arc ecosystem directory by slug (slugs come from arc_ecosystem): summary, status with evidence, links, contracts on Arc and sources.
Parametersslugrequired
arc_numbers
Arc in 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.
Takes no parameters.
arc_apps_week
Arc apps, last 7 days
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.
Takes no parameters.
Version history
1
v1.0.0LatestOct 16, 2026
Score
83%
83% of the applicable checks met
How complete this listing is, computed from the registry entry, the endpoint and public sources. Not a rating of the server and not a statement that it is safe or working today: reachability is a dated check, and no installs or reviews go into the score.
Reached in the last 30 daysRequired25 pts
Auth declaredRequired10 pts
Tools listedRequired15 pts
DescriptionRequired15 pts
Logo10 pts
Documentation15 pts
Declare a GitHub repository with a README, or serve resource_documentation in the OAuth protected-resource metadata.
LicenseNot applicable
A hosted service is used under its provider's terms, so no license is expected here. This check is left out of the percentage.