Spec Driven Development
by formulahendry
MCP Server that facilitates spec-driven development workflows, not just Vibe Coding.
Runs on your computer★ 440MITUpdated 14 months ago
Install
Altscan explorers
Overview
Description from the maker (original English)
Keyless, read-only BNB Chain and Ethereum data: transactions by hash, tokens with a lookalike check
PopNx MCP’s three pillars
These three are never merged into one score: opinions, measurements and popularity are different things.
- User voiceiNo reviews yetReviews open together with accounts in a later step
- Our basic checksi1 of 1 passedChecked from public information; code not scanned yet
- UsageiNot measured yet★ –
What you can do with it
We have not written a plain-language summary for this one yet. Below are the facts we read from the registry.
- Connection: Runs in the cloud
- Transport: Streamable HTTP
- Category: Other
Install
Pick the AI app you use, then copy the settings.
Before you install
- Basic checks: 1 of 1 passed
- Runs on the maker’s server: what you ask it goes through their server.
- The registry lists no key to fill in.
You need
- Runs in the cloudNothing to install; it connects over the internet
Which app do you use?
Pick your app above. We remember it, so next time the button says “Install in …”.
Works in Claude on the web, desktop and mobile:
- Open Settings → Connectors
- Press Add custom connector
- Paste the address below and press Add
- If it asks you to sign in, sign in with the maker
https://altscan.io/mcpRun this in your terminal
claude mcp add --transport http explorers https://altscan.io/mcpOr copy the settings yourself
Paste into .cursor/mcp.json in your project, or ~/.cursor/mcp.json
{
"mcpServers": {
"explorers": {
"url": "https://altscan.io/mcp"
}
}
}Your browser asks to open the app, then the app shows the settings and asks you to confirm. Key values are left empty for you to fill in.
Or copy the settings yourself
Paste into .vscode/mcp.json in your project
{
"servers": {
"explorers": {
"type": "http",
"url": "https://altscan.io/mcp"
}
}
}Your browser asks to open the app, then the app shows the settings and asks you to confirm. Key values are left empty for you to fill in.
ChatGPT connects only to servers on the internet:
- Open ChatGPT on the web → Settings → Connectors (Apps)
- Press Create or Add (some plans need Developer mode under Advanced first)
- Paste the address below, give it a name and save
- If it asks you to sign in, sign in with the maker
https://altscan.io/mcpMenu names can differ slightly by plan and over time.
Your choice stays on this device in a cookie; no account needed.
These settings are generated from the maker’s registry entry. If the README says otherwise, follow the README.
What it can do
We have not read this server’s tool list yet; we check endpoints in rotation.
Basic checksi
We check information anyone can see; we have not read the code. Checks that do not apply are left out of the count. · Checked Nov 6, 2026
- ✓ Pass
Maker matches the repo
The registry name was verified against the domain altscan.io (the registry checks domain ownership)
- … Not checked yet
Still maintained
We have not read this repo from GitHub yet
- … Not checked yet
Has a licence
We have not read this repo from GitHub yet
- … Not checked yet
Endpoint responds
Not checked yet; we check endpoints in rotation
- … Not checked yet
Sign-in with OAuth
Not checked yet; we check endpoints in rotation
- … Not checked yet
No hidden instructions in tool descriptions
Not checked yet; we read the tool list when we check the endpoint
Compared with others in Otheri
- More stars than 0% of the other 32476 servers in this category
- Published to the registry more recently than 69% of the other 32476 servers in this category
- Basic checks equal to or better than 100% of the other 32476 servers in this category
Compared with every active server in this category in the registry. Stars count only when the publisher owns the repo.
Common questions
Is Altscan explorers safe?
It passed 1 of 1 applicable basic checks. We have not read the code. Before adding a key or token, see what access the server asks for and use a key with only the permissions you need.
What keys or codes does it need?
The registry does not list a required key, though some servers ask you to sign in on first use.
Does it run on my computer or in the cloud?
It runs in the maker’s cloud. Connect over the internet with nothing to install, but what you send passes through the maker’s servers.
Is it still maintained?
The GitHub repo last changed –, and the latest version (0.1.0) reached the registry 16 days ago.
Which apps can use it?
Apps that support MCP, such as Claude Desktop, Claude Code, Cursor and VS Code. It connects by URL, so apps that accept remote MCP servers work too, such as ChatGPT in developer mode.
What can I use instead?
In the same category: Spec Driven Development, Remote Desktop Commander, zanadir
Alternatives
Servers in the same category from other makers, sorted by stars.
Reading a card:★ GitHub starsiThree pillars: reviews · checks · usageiUpdated = latest version published to the registryi
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README from the maker
Open the README
Copied from the maker’s repo as written. PopNx MCP has not reviewed or endorsed it. HTML, images and scripts are removed. Links lead off this site.
Altscan
The open-source, multi-chain block explorer platform.
One codebase powers independent explorers for BNB Chain and Ethereum today — and is built to add more chains over time.
Next.js 15, Drizzle ORM, and ethers.js. Maintained by Measurable Data Token (MDT) .
altscan.io | bnbscan.com | ethscan.io | Changelog
What is this?
Altscan is an open-source, multi-chain block explorer platform. One codebase powers two independent explorers today — BNBScan (bnbscan.com, BNB Chain) and EthScan (ethscan.io, Ethereum) — and is designed to extend to more chains over time. They are fully independent from BscScan, Etherscan, Binance, or the Ethereum Foundation, providing a clean, fast interface for exploring blocks, transactions, addresses, tokens, and on-chain activity.
A single CHAIN environment variable selects which chain a deployment serves — same frontend, same indexer, same schema.
Screenshots
| EthScan homepage, dark mode | Block |
|---|---|
| Transaction | Address |
|---|---|
| Token | Status page |
|---|---|
Captured from production on 12 October 2026, with the sponsored slots switched off.
Features
Exploration
- Block tape — the latest blocks drawn as a live strip (width = transactions, fill = gas used), on the homepage and through the block, transaction, address and analytics pages
- Blocks — the latest blocks with validator, gas, and transaction counts; each block page lists its transactions
- Transactions — a one-line summary of what happened, the fee breakdown, logs, and token and NFT transfers; internal transactions when a trace endpoint is configured (off by default)
- Addresses — balance and tracked-token holdings, transaction history drawn as a ledger, token transfers, and NFTs
- Tokens — ERC-20 / BEP-20 pages with market data, holders, and transfers; lookalike (homoglyph) tokens are labelled
- Search — addresses, transaction hashes, block numbers, and token names or symbols
Analytics
- DEX Trades — Uniswap-V2-style swaps (PancakeSwap V2 on BNB Chain, Uniswap V2 on Ethereum); V3-style pools are not indexed
- Whale Tracker — the largest native, wrapped and stablecoin transfers in the last hour, the last day, or the whole retained window
- Gas Tracker — slow, standard and fast prices from the percentiles of recent blocks
- Network Charts — transaction count, blocks produced, and (on Ethereum) average base fee; hourly until the index holds three full days
- Validators (BNB Chain) — the validator set with voting power, commission, and blocks produced in the last 24 hours
Developer Tools
- REST API — a v1 query API, optional API keys minted by signing a message with your wallet, and webhooks
- CSV Export — the latest 1,000 locally indexed transactions for an address
- Contract status — shows whether a contract is verified on Sourcify; verify new source at sourcify.dev
Also
- Dark mode that follows the system setting, and layouts built for phones
- Watchlist — save addresses in your browser (no account, nothing leaves the device)
- Network switcher — links to the sister explorer on the other chain
- Status page — status.altscan.io tracks uptime, block lag, and response time for the hosted explorers
Architecture
altscan/├── apps/ │ ├── explorer/ Unified Next.js 15 frontend + API routes │ │ CHAIN=bnb → bnbscan.com │ │ CHAIN=eth → ethscan.io │ ├── indexer/ Unified block indexer (direct polling loop) │ │ CHAIN=bnb → indexes BNB Chain │ │ CHAIN=eth → indexes Ethereum │ ├── status/ Hono status page for the hosted explorers │ │ Polls /api/health on bnbscan.com and ethscan.io │ ├── altscan-site/ altscan.io umbrella site (Astro on Cloudflare Workers) │ └── admin/ Operator console behind Cloudflare Access (Astro on Cloudflare Workers) ├── packages/ │ ├── chain-config/ getChainConfig() — chain-specific config │ ├── db/ Drizzle ORM schema + Postgres client │ ├── explorer-core/ Shared utils (rate limiting, formatting, Redis cache) │ ├── providers/ Third-party data adapters (Moralis) and their spend budgets │ ├── settings-schema/ Runtime settings shared by the explorer and the admin console │ └── types/ Shared TypeScript types ├── render.yaml Render blueprint for the hosted explorers ├── docker-compose.yml Self-host stack: Postgres, Redis, indexer, explorer ├── turbo.json Turborepo pipeline config └── pnpm-workspace.yaml
Tech Stack
| Layer | Technology |
|---|---|
| Frontend | Next.js 15 (App Router), React 19, Tailwind CSS 3 |
| Backend | Next.js API routes, Hono (status page) |
| Database | PostgreSQL (via Drizzle ORM) |
| Indexer | ethers.js, JSON-RPC (direct polling loop, no job queue) |
| Cache | Redis (rate limiting, caching, Moralis CU ledger) |
| Edge sites | Astro on Cloudflare Workers (altscan.io, admin console) |
| Monorepo | pnpm + Turborepo |
| Hosting | Render.com (web services + workers + Postgres + Redis) |
How It Works
- Indexer connects to a chain's JSON-RPC endpoint, polls for new blocks, and writes block/transaction/token data to Postgres via Drizzle ORM.
- Explorer serves the Next.js frontend with ISR (Incremental Static Regeneration) — each page revalidates on its own schedule, from 45 seconds to five minutes, for fresh data without server pressure. Pages that depend on the request, such as search, render per request.
- Chain Config package centralizes all chain-specific differences (block time, currency, theme colors, RPC URLs, feature flags) so the same code runs both chains.
- Status Page independently monitors the two hosted explorers by polling their
/api/healthendpoints every 30 seconds, tracking uptime, block lag, and response time over 24 hours and 30 days. Its targets are fixed inapps/status/src/server.ts, and it is not part of the Docker stack or the Render blueprint.
Getting Started
Run your own explorer (Docker)
git clone https://github.com/heathermhuang/altscan.gitcd altscan cp .env.docker.example .env docker compose up -d
Open http://localhost:3000. That's Postgres, Redis, the indexer, and the explorer — no configuration required to start, and the indexer creates its own schema on first boot. Set CHAIN=eth in .env and re-run with --build for Ethereum.
Full guide, including Render deployment, retention tuning, and limitations: [docs/SELF_HOSTING.md](docs/SELF_HOSTING.md).
Develop locally (without Docker)
Prerequisites
- Node.js 22 — what CI and the Docker images run
- pnpm 10 — pinned in
package.json;corepack enablepicks up the exact version - PostgreSQL 16
- Redis 7 — optional: without
REDIS_URL, rate limits and caches fall back to per-process memory
Installation
# Clone the repogit clone https://github.com/heathermhuang/altscan.git cd altscan
Install dependencies
pnpm install
Start Postgres from the Docker stack (localhost:5432; user, password and database all "altscan")
docker compose up -d postgres
Set up the explorer environment (defaults match the local Docker Postgres)
cp apps/explorer/.env.example apps/explorer/.env.local
Start the BNB explorer
CHAIN=bnb NEXT_PUBLIC_CHAIN=bnb pnpm --filter @altscan/explorer dev
The BNB explorer will be available at http://localhost:3000. The indexer creates the database schema on its first boot, so run it once (below) before expecting data; the explorer alone, against an empty database, has no tables to read. pnpm dev starts every app at once through Turborepo: the explorer, the indexer, the status page, and both Astro sites.
Running a specific chain
# BNB Chain explorer onlyCHAIN=bnb NEXT_PUBLIC_CHAIN=bnb pnpm --filter @altscan/explorer dev
Ethereum explorer only
CHAIN=eth NEXT_PUBLIC_CHAIN=eth pnpm --filter @altscan/explorer dev -p 3001
BNB indexer only — build the packages it imports first (see below)
pnpm --filter @altscan/db build && pnpm --filter @altscan/chain-config build && pnpm --filter @altscan/explorer-core build && pnpm --filter @altscan/providers build CHAIN=bnb pnpm --filter @altscan/indexer dev
Status page only (monitors the hosted sites)
pnpm --filter @altscan/status dev
CHAIN drives the server; NEXT_PUBLIC_CHAIN is inlined into the client bundle, so set both to the same chain. The indexer reads its settings from the environment or from apps/indexer/.env: at least DATABASE_URL (or ETH_DATABASE_URL), the chain's RPC URL, and a START_BLOCK near the chain head — its built-in start is millions of blocks back.
The explorer compiles the workspace packages from source, but the indexer loads their built dist/ output, which is not committed — build them once after cloning and again after changing them.
Environment Variables
These are the variables a deployment needs. apps/explorer/.env.example adds the optional provider caps, and docs/SELF_HOSTING.md covers the indexer's retention and disk settings.
| Variable | Required | Description |
|---|
| CHAIN | Yes | bnb or eth — selects which
Only the beginning is shown; read the rest in the repo