Crypto Sentiment X402

Name: Crypto Sentiment X402
Author: whatevercat-creator

by whatevercat-creatorversion 0.1.6i★ –iRuns on your computer

Registry nameio.github.whatevercat-creator/crypto-sentiment-x402

Install

Overview

Description from the maker (original English)

Ticker sentiment from 9 crypto news outlets + Fear & Greed over 72h, with the headlines behind it

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 on your computer
Transport: stdio
Category: Crypto & blockchain
You need to fill in: CDP_API_KEY_ID, CDP_API_KEY_SECRET

Install

Pick the AI app you use, then copy the settings.

Before you install

Basic checks: 1 of 1 passed
Runs on your computer with your user’s permissions (files, network, apps).
You fill in yourself: CDP_API_KEY_ID, CDP_API_KEY_SECRET, CDP_WALLET_NAME, SENTIMENT_API_URL, X402_NETWORK, SENTIMENT_PAY_TO

Values marked secret are keys to your account. Never share them or paste them into a chat.

You need

PyPIPython’s uv installed (for the uvx command)

Which app do you use?

ClaudeClaude CodeCursorVS CodeChatGPT

Pick your app above. We remember it, so next time the button says “Install in …”.

Open Claude Desktop → Settings → Developer → Edit Config, and paste this into claude_desktop_config.json

{
  "mcpServers": {
    "crypto-sentiment-x402": {
      "command": "uvx",
      "args": [
        "crypto-sentiment-x402-mcp"
      ],
      "env": {
        "CDP_API_KEY_ID": "your-value",
        "CDP_API_KEY_SECRET": "your-value",
        "CDP_WALLET_NAME": "your-value",
        "SENTIMENT_API_URL": "your-value",
        "X402_NETWORK": "your-value",
        "SENTIMENT_PAY_TO": "your-value"
      }
    }
  }
}

Run this in your terminal

claude mcp add crypto-sentiment-x402 --env CDP_API_KEY_ID=your-value --env CDP_API_KEY_SECRET=your-value --env CDP_WALLET_NAME=your-value --env SENTIMENT_API_URL=your-value --env X402_NETWORK=your-value --env SENTIMENT_PAY_TO=your-value -- uvx crypto-sentiment-x402-mcp

Fill in the empty values before running it.

Open in Cursor

Or copy the settings yourself

Paste into .cursor/mcp.json in your project, or ~/.cursor/mcp.json

{
  "mcpServers": {
    "crypto-sentiment-x402": {
      "command": "uvx",
      "args": [
        "crypto-sentiment-x402-mcp"
      ],
      "env": {
        "CDP_API_KEY_ID": "your-value",
        "CDP_API_KEY_SECRET": "your-value",
        "CDP_WALLET_NAME": "your-value",
        "SENTIMENT_API_URL": "your-value",
        "X402_NETWORK": "your-value",
        "SENTIMENT_PAY_TO": "your-value"
      }
    }
  }
}

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.

Open in VS Code

Or copy the settings yourself

Paste into .vscode/mcp.json in your project

{
  "servers": {
    "crypto-sentiment-x402": {
      "type": "stdio",
      "command": "uvx",
      "args": [
        "crypto-sentiment-x402-mcp"
      ],
      "env": {
        "CDP_API_KEY_ID": "your-value",
        "CDP_API_KEY_SECRET": "your-value",
        "CDP_WALLET_NAME": "your-value",
        "SENTIMENT_API_URL": "your-value",
        "X402_NETWORK": "your-value",
        "SENTIMENT_PAY_TO": "your-value"
      }
    }
  }
}

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.

This one runs on your computer, and ChatGPT can only connect to servers on the internet. Pick another app.

Your choice stays on this device in a cookie; no account needed.

Values you fill in

CDP_API_KEY_ID secret env
Coinbase Developer Platform API key ID (portal.cdp.coinbase.com). Used to sign x402 payments from your own wallet. Only needed for the paid tools (crypto_sentiment, get_hourly_history); the free tool…
CDP_API_KEY_SECRET secret env
Coinbase Developer Platform API key secret, paired with CDP_API_KEY_ID. Only needed for the paid tools (crypto_sentiment, get_hourly_history); the free tools work without it.
CDP_WALLET_NAME env
Name of the CDP wallet to create/reuse for payments. Defaults to "crypto-sentiment-mcp-wallet". Must hold USDC (+ a little ETH for gas) on the configured network.
SENTIMENT_API_URL env
Base URL of the deployed sentiment API. Defaults to https://crypto-sentiment-x402.onrender.com.
X402_NETWORK env
"mainnet" (default, real USDC on Base) or "testnet" (free Base Sepolia USDC).
SENTIMENT_PAY_TO env
payTo address the paid tools expect in the 402; anything else is refused before signing. Defaults to the hosted API's wallet. Set it when SENTIMENT_API_URL points at your own deployment.

These settings are generated from the maker’s registry entry. If the README says otherwise, follow the README.

What it can do

Runs on your computer; the tool list appears in your AI app after you install it.

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 8, 2026

✓ Pass
Maker matches the repo
The registry name was verified with the GitHub account whatevercat-creator, which owns the repo
… 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 applicable
Endpoint responds
This one runs on your computer; there is no internet endpoint
– Not applicable
Sign-in with OAuth
Runs on your computer and uses local settings instead
… Not checked yet
No hidden instructions in tool descriptions
Runs on your computer; we can only read tool lists from internet endpoints

Compared with others in Crypto & blockchaini

More stars than 0% of the other 1612 servers in this category
Published to the registry more recently than 80% of the other 1612 servers in this category
Basic checks equal to or better than 100% of the other 1612 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 Crypto Sentiment X402 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?

You need to fill in: CDP_API_KEY_ID, CDP_API_KEY_SECRET

Does it run on my computer or in the cloud?

It runs on your computer. Your AI app starts it when needed, and data does not pass through the maker’s servers (unless it calls an online service itself).

Is it still maintained?

The GitHub repo last changed –, and the latest version (0.1.6) reached the registry 13 days ago.

Which apps can use it?

Apps that support MCP, such as Claude Desktop, Claude Code, Cursor and VS Code. You also need Python (uv) on your computer.

What can I use instead?

In the same category: NEMO x402 Micro-Services, Crypto Derivatives Data: Perp Funding Rates, Open Interest, Basis, IV, Agent Data Tools: Prices and DeFi

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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Agent Data Tools: Prices and DeFi

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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.

Crypto Sentiment API (x402)

News-based crypto sentiment for AI agents and trading bots, paid per call in USDC on Base over x402. No account or API key: call the endpoint, get an HTTP 402 with the price, pay, and get JSON.

Live at https://crypto-sentiment-x402.onrender.com · API docs · llms.txt

What you get

Endpoint	Price	Returns
`GET /sentiment/{symbol}`	$0.01 per call	A bullish / bearish / neutral label, a score from -1 to 1, the sample size, and the up to 5 headlines that moved the score most (title, source, link).
`GET /history/{symbol}?start=&end=`	$0.05 per call	Hourly readings recorded live at the top of every UTC hour (never backfilled): score, sample size, Fear & Greed value and the top 3 headlines per hour. Default the last 7 days, up to 30 days per call.
`GET /archive`	free	Which symbols the hourly archive holds, from when, and how complete it is.

The 402 response is the source of truth for the current price.

24 coins: BTC, ETH, SOL, XRP, DOGE, ADA, AVAX, LINK, MATIC, DOT, SHIB, LTC, BNB, USDC, USDT, NEAR, HYPE, QNT, AAVE, TAO, PEPE, PUMP, ENA, STRK.

Refused calls are never charged. The payment only settles when you get a reading:

404: a symbol that isn't one of the 24 coins (a stock ticker, say).
422: too little recent news about that coin for a reliable reading.
/history also refuses (4xx, not charged) an invalid range, a range with no readings, and a range in which every hour had zero matching headlines.

Prefer a monthly bill? The same readings are on GET /v1/sentiment/{symbol} with an X-API-Key header (plans, including a free tier). There's also an MCP server: pip install crypto-sentiment-x402-mcp (see MCP.md).

How it's scored

Sources (all free, no keys required):

Crypto news RSS (9 outlets): CoinDesk, Cointelegraph, Decrypt, Bitcoin Magazine, The Block, CryptoSlate, NewsBTC, CryptoPotato, The Defiant (DL News was removed on 2026-10-04: its feed served only April-May 2026 items)
Fear & Greed Index: alternative.me

Scoring: VADER sentiment analysis, extended with a crypto slang lexicon (moon, rekt, rug, hodl, bullish/bearish, etc.) so slang isn't scored as neutral. Each headline is matched and scored on its title plus its feed description with HTML tags, entities, feed footers and the outlet's own name removed (clean_text in app/sources/news.py; method 72h-hl24-v2 from 2026-10-21). Only headlines published in the last 72 hours count, and each headline's weight halves for every 24 hours of age (app/window.py). When the effective sample size is below 5, the label is insufficient recent news and the paid endpoints refuse with a 422 instead of charging. Whether the score leads or lags price is published at /validation, whatever it shows.

News sentiment only: not a price prediction or financial advice.

Running your own copy

1. Get a Base wallet address

You need an address to receive USDC payments. Any standard Ethereum-style wallet works on Base (e.g. Coinbase Wallet, MetaMask configured for Base). You do not need to give this app your private key — only the public address, to receive funds.

2. Run it locally (testnet — free, no real money)

cd crypto-sentiment-x402

cp .env.example .env

edit .env and set PAY_TO_ADDRESS to your wallet address

pip install -r requirements.txt uvicorn app.main:app --reload

Visit http://localhost:8000 — you'll see the API description. Calling http://localhost:8000/sentiment/BTC without payment returns an HTTP 402 with payment instructions, exactly what an agent's x402 client would see and act on automatically.

To actually test a paid call, use the official x402 test client (needs Base Sepolia testnet USDC — free from the Base Sepolia faucet):

pip install x402

python -m x402.examples.client --url http://localhost:8000/sentiment/BTC

3. Deploy (simplest path: Render.com)

Push this folder to a new GitHub repo.
Go to render.com → New → Blueprint → connect the repo. Render will read render.yaml automatically.
When prompted, set the PAY_TO_ADDRESS environment variable to your wallet address.
Deploy. Render builds the Dockerfile and gives you a public HTTPS URL like https://crypto-sentiment-x402.onrender.com.

That's it — testnet mode is on by default, so nothing costs real money until you flip X402_NETWORK to mainnet (step 4 below).

4. Go live with real USDC payments

Sign up for a free Coinbase Developer Platform account and create an API key — this is required for the mainnet facilitator (production-grade payment verification/settlement).
In Render, set:

X402_NETWORK=mainnet
CDP_API_KEY_ID=...
CDP_API_KEY_SECRET=...
PAY_TO_ADDRESS = your mainnet Base address (double-check it's not a testnet-only address)

Redeploy. Calls now settle real USDC on Base mainnet.

Start with a low price (X402_PRICE_USD, default $0.01) while you validate everything works end-to-end.

5. List it so AI agents can find and pay you

This is the x402 Bazaar — Coinbase's discovery layer, essentially a search engine for agents looking for x402 services.

If you're using the CDP facilitator (i.e. you're on mainnet per step 4), your service becomes automatically discoverable in the Bazaar once you process your first real payment through it — no separate signup.
To improve how well agents can find and understand it, keep the description field in app/main.py's RouteConfig clear and specific (already set) — that text is what shows up in Bazaar search results.
You can browse the current Bazaar listing yourself at https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources (public, no key needed) to confirm your service appears after going live.
Optional extra distribution: submit your API to x402bazaar.org, a community-run directory of x402 services, separate from Coinbase's own Bazaar.

MCP server (Claude Desktop / Claude Code)

Prefer agents calling this over MCP instead of raw HTTP? mcp_server.py wraps the same API as MCP tools (crypto_sentiment, get_hourly_history and three free info tools) -- the server pays for each call from its own CDP-managed wallet, so callers never touch crypto directly. See MCP.md for setup.

Try it free

Three tools need no wallet, no CDP key and pay nothing. The server starts without any CDP variables, so you can install it and try these first:

list_supported_coins — the 24 supported ticker symbols and names.
archive_coverage — what the hourly archive holds (GET /archive): first reading, row counts and missing hours per symbol.
price_quote(symbol) — makes one unpaid request and reads the 402 payment requirements: price, network, asset and the payTo address.

Two tools are paid, from your own CDP wallet in USDC on Base:

crypto_sentiment(symbol) — the current reading, $0.01 per call. Unsupported coins and coins with too little recent news are refused and not charged.
get_hourly_history(symbol, start, end) — past hourly readings (GET /history/{symbol}), $0.05 per call. Recorded live and never backfilled; start/end are ISO 8601, default the last 7 days, at most 30 days per call. The symbol has to be one archive_coverage lists as logged. Unlogged symbols, invalid ranges and ranges with no readings are refused and not charged.

Wallet setup is in MCP.md.

Subscription tiers (Stripe, no crypto required)

Prefer a monthly bill over pay-per-call USDC? GET /v1/sentiment/{symbol} takes an X-API-Key header instead of an x402 payment, backed by Free / Starter ($15/mo) / Pro ($59/mo) tiers. See BILLING.md for setup, or GET /billing/pricing on a running instance for current pricing.

Sentiment-shift alerts

Watch a symbol and get pinged (webhook / Discord / Telegram) when its sentiment moves, instead of polling /sentiment yourself. Bundled into the Starter/Pro subscription tiers -- see ALERTS.md.

Historical dataset export

Sells access to the *history* of sentiment readings, not just the current one -- a background job takes one snapshot per symbol per day, and subscribers on the Pro or "Data Access" tier can export everything collected so far as CSV or JSON via GET /dataset/export. See DATASET.md (there's no backfilled history -- it only has data from whenever you turn the snapshot loop on).

Also on RapidAPI

Listed on the RapidAPI Hub for developers who'd rather discover and pay for it through RapidAPI's marketplace instead of Stripe or x402 directly. Same underlying data, served from GET /rapidapi/sentiment/{symbol} -- traffic is only accepted when it's routed through RapidAPI's proxy (validated via a shared secret header), so this endpoint isn't meant to be called directly. Plans there mirror the Stripe tiers: Free (100 req/mo), $15/mo (3,000 req), $59/mo (15,000 req).

Zapier & TradingView integrations

Route sentiment-shift alerts into Zapier (via the existing webhook channel -- no new endpoint needed) or enrich TradingView price alerts with live sentiment before relaying them to your webhook/Discord/ Telegram. See INTEGRATIONS.md.

API reference

Endpoint	Price	Description
`GET /`	Free	Service info
`GET /health`	Free	Health check
`GET /sentiment/{symbol}`	$0.01 (configurable)	Aggregate sentiment for a symbol, e.g. `/sentiment/BTC`

Example paid response:

"symbol": "BTC", "name": "Bitcoin", "overall_sentiment": { "sample_size": 42, "average_compound": 0.21, "label": "bullish", "positive_pct": 55.0, "negative_pct": 15.0, "neutral_pct": 30.0, "unweighted_compound_72h": 0.17, "effective_sample_size": 31.4, "newest_headline_age_hours": 1.6, "window": "72h-hl24-v2" }, "drivers": [{ "title": "...", "source": "CoinDesk", "link": "https://...", "published": "...", "score": 0.62, "weight": 0.93, "effect": 0.03 }], "drivers_summary": "3 of the top 5 headlines are positive, 2 are negative.", "breakdown": { "news": { "...": "..." }, "fear_greed_index": { "value": 62, "classification": "Greed" } }, "sources": ["coindesk.com RSS", "..."] }

Notes and limitations

Reddit was removed as a source: Reddit's Responsible Builder Policy prohibits commercial use of their data without written approval, which this paid API would violate. app/sources/reddit.py is left in the repo unused in case that changes in the future.
Coin coverage: app/coins.py has a starter list of ~15 symbols. Add more as needed — unmapped symbols still work, just with slightly less accurate news matching (falls back to matching on the symbol itself).
Only supports the exact payment scheme on Base/EVM. The x402 SDK also supports Solana (ExactSvmServerScheme) if you want to accept SOL-based USDC too — see the commented-out import in app/main.py's dependencies.
Add more paid endpoints (e.g. historical sentiment, multi-symbol batch queries) by adding entries to the routes dict in app/main.py.

Crypto Sentiment X402

Overview

PopNx MCP’s three pillars

What you can do with it

Install

Before you install

Values you fill in

What it can do

Basic checksi

Maker matches the repo

Still maintained

Has a licence

Endpoint responds

Sign-in with OAuth

No hidden instructions in tool descriptions

Compared with others in Crypto & blockchaini

Common questions

Alternatives

NEMO x402 Micro-Services

Crypto Derivatives Data: Perp Funding Rates, Open Interest, Basis, IV

Agent Data Tools: Prices and DeFi

README from the maker

Crypto Sentiment API (x402)

What you get

How it's scored

Running your own copy

1. Get a Base wallet address

2. Run it locally (testnet — free, no real money)

edit .env and set PAY_TO_ADDRESS to your wallet address

3. Deploy (simplest path: Render.com)

4. Go live with real USDC payments

5. List it so AI agents can find and pay you

MCP server (Claude Desktop / Claude Code)

Try it free

Subscription tiers (Stripe, no crypto required)

Sentiment-shift alerts

Historical dataset export

Also on RapidAPI

Zapier & TradingView integrations

API reference

Notes and limitations