Obol

Name: Obol
Author: halfkey

by halfkeyversion 2.0.1i★ 0iRuns on your computer

Registry nameio.github.halfkey/obol

How to install

What it does

Solana agent gateway via x402. Wallet, token, DeFi, and swap tools. Pay per request.

Connects Runs on your computer
Account or key No key needed
Category Crypto & blockchain

Install

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

Passed 2/3 checks · Runs on your computer

First: which AI do you use?

ClaudeWeb · app · phoneChatGPTWebClaude CodeTerminalCursorCode editorVS CodeCode editorOtherOther apps

Pick your app and the steps appear below.

Works with Claude, with some setup first

You need a Obol key (create it on the maker’s site) · Install Node.js on your computer first (one time) · Only the Claude desktop app (Windows or Mac), not the web or phone

Install Node.js
One time only; it works for every server that needs Node.js
Open the Node.js download page ↗
Done
Sign up and create a Obol key
Open the maker’s site, sign up and create an API key for the next step. Check the maker’s site for pricing and free plans.
How to get a key is in the maker’s README below
Done
Open the Claude desktop app’s settings file
SettingsDeveloperEdit Config
Done

Paste these settings and save the file

{
  "mcpServers": {
    "obol": {
      "command": "npx",
      "args": [
        "-y",
        "obol-mcp"
      ],
      "env": {
        "OBOL_URL": "your-value"
      }
    }
  }
}

Paste the key only into the app’s field, never into a chat or to anyone

Done

Quit Claude and open it again
Done
Try it
Use Obol and tell me what you can do for me, then show me one thing
✓ If Claude says it is using Obol or shows a Obol tool in the answer, you are connected

Menu names checked against Anthropic’s help page on Nov 11, 2026 · your screen may differ slightly by app version

ChatGPT cannot connect Obol yet

Obol runs on your computer, but ChatGPT can only connect servers that run on the web

What you can do instead

A · Use an app that can connect Obol

Steps for Claude →You need a Obol key (create it on the maker’s site) · Install Node.js on your computer first (one time) · Only the Claude desktop app (Windows or Mac), not the web or phone
Steps for Claude Code →You need a Obol key (create it on the maker’s site) · Install Node.js on your computer first (one time)
Steps for Cursor →You need a Obol key (create it on the maker’s site) · Install Node.js on your computer first (one time)
Steps for VS Code →You need a Obol key (create it on the maker’s site) · Install Node.js on your computer first (one time)

B · Others in Crypto & blockchain that work with ChatGPT

Picked from the most used in the same category, only ones that connect by address with no key

Solana MCP by Vybe✓ ChatGPT
0xinsider✓ ChatGPT
Highwire✓ ChatGPT

Works with Claude Code, with some setup first

You need a Obol key (create it on the maker’s site) · Install Node.js on your computer first (one time)

Install Node.js
One time only; it works for every server that needs Node.js
Open the Node.js download page ↗
Done
Sign up and create a Obol key
Open the maker’s site, sign up and create an API key for the next step. Check the maker’s site for pricing and free plans.
How to get a key is in the maker’s README below
Done
Open Terminal
Mac: press Command+Space and type Terminal · Windows: open PowerShell
Done
4
Paste this command and press Enter
```
claude mcp add --scope user obol --env OBOL_URL=your-value -- npx -y obol-mcp
```
Replace “your-value” with your key before pressing Enter
Paste the key only into the app’s field, never into a chat or to anyone
Done
Type /mcp in Claude Code
You should see Obol listed as connected
Done
Try it
Use Obol and tell me what you can do for me, then show me one thing
✓ If Claude Code says it is using Obol or shows a Obol tool in the answer, you are connected

Menu names checked against Anthropic’s help page on Nov 11, 2026 · your screen may differ slightly by app version

Works with Cursor, with some setup first

You need a Obol key (create it on the maker’s site) · Install Node.js on your computer first (one time)

Install Node.js
One time only; it works for every server that needs Node.js
Open the Node.js download page ↗
Done
Sign up and create a Obol key
Open the maker’s site, sign up and create an API key for the next step. Check the maker’s site for pricing and free plans.
How to get a key is in the maker’s README below
Done
Click this button to open Cursor
Open in Cursor
Cursor asks you to confirm; click Install
Done
Fill in your key
In the Obol settings, OBOL_URL is empty; add your key and save
Paste the key only into the app’s field, never into a chat or to anyone
Done
Open the AI chat in Cursor in Agent mode
Done
Try it
Use Obol and tell me what you can do for me, then show me one thing
✓ If Cursor says it is using Obol or shows a Obol tool in the answer, you are connected

Menu names checked against Cursor’s help page on Nov 11, 2026 · your screen may differ slightly by app version

Works with VS Code, with some setup first

You need a Obol key (create it on the maker’s site) · Install Node.js on your computer first (one time)

Install Node.js
One time only; it works for every server that needs Node.js
Open the Node.js download page ↗
Done
Sign up and create a Obol key
Open the maker’s site, sign up and create an API key for the next step. Check the maker’s site for pricing and free plans.
How to get a key is in the maker’s README below
Done
Click this button to open VS Code
Open in VS Code
VS Code asks you to confirm; click Install
Done
Fill in your key
In the Obol settings, OBOL_URL is empty; add your key and save
Paste the key only into the app’s field, never into a chat or to anyone
Done
Open the AI chat in VS Code in Agent mode
Done
Try it
Use Obol and tell me what you can do for me, then show me one thing
✓ If VS Code says it is using Obol or shows a Obol tool in the answer, you are connected

Menu names checked against VS Code’s help page on Nov 11, 2026 · your screen may differ slightly by app version

Other apps that use MCP, such as Windsurf, Zed or Gemini CLI, each add servers differently. See how in the app list.

See every app that uses MCP →

JSON settings are under “For developers” below

Stuck? Ask people who use Obol💬 Discussion →

For developers: Terminal commands and JSON settings

Installed on your computer

Claude Code

claude mcp add --scope user obol --env OBOL_URL=your-value -- npx -y obol-mcp

Claude Desktop (claude_desktop_config.json)

{
  "mcpServers": {
    "obol": {
      "command": "npx",
      "args": [
        "-y",
        "obol-mcp"
      ],
      "env": {
        "OBOL_URL": "your-value"
      }
    }
  }
}

Cursor (~/.cursor/mcp.json)

{
  "mcpServers": {
    "obol": {
      "command": "npx",
      "args": [
        "-y",
        "obol-mcp"
      ],
      "env": {
        "OBOL_URL": "your-value"
      }
    }
  }
}

VS Code (mcp.json)

{
  "servers": {
    "obol": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "obol-mcp"
      ],
      "env": {
        "OBOL_URL": "your-value"
      }
    }
  }
}

Values you fill in

OBOL_URL env
URL of the Obol API instance

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

At a glance

GitHub stars i: 0
Downloads per weeki: 58/wk
Licence i: MIT
Connection: Runs on your computer
Transport: stdio
Latest versioni: 2.0.1
Categoryi: Crypto & blockchain
Published to registryi: Apr 5, 2026
Code last changedi: Apr 8, 2026
Maker: halfkey
Packages: npm: obol-mcp
Repo: halfkey/obol
Registry status: Active

Which apps can use it

Based on how this server connects and on each app’s own docs, checked Nov 10, 2026.

Run on your computer in

Claude Goose LM Studio Msty Studio Cherry Studio Cursor VS Code + GitHub Copilot Visual Studio Windsurf (Devin Desktop)Zed Kiro Cline Continue JetBrains AI Assistant Claude Code Codex CLI Gemini CLI OpenCode nodecode Warp LibreChat Raycast

All apps, with pros and cons →

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 12, 2026

✓ Pass
Maker matches the repo
The registry name was verified with the GitHub account halfkey, which owns the repo
! Caution
Still maintained
Code last changed 7 months ago, more than 6 months ago
✓ Pass
Has a licence
Uses MIT
– 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

Discussion

Ask, share a tip or report that it does not work. Sorted by what people marked helpful.

No posts yet. Be the first to ask or share.

Posts here are written by users, not the PopNx team.

User reviews

No reviews yet

Compared with others in Crypto & blockchaini

More stars than 0% of the other 1660 servers in this category
Published to the registry more recently than 10% of the other 1660 servers in this category
Basic checks equal to or better than 49% of the other 1660 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 Obol safe?

It passed 2 of 3 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 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 7 months ago, and the latest version (2.0.1) reached the registry 7 months ago.

Which apps can use it?

Apps that support MCP, such as Claude Desktop, Claude Code, Cursor and VS Code. You also need Node.js on your computer.

What can I use instead?

In the same category: Solana MCP by Vybe, Oracle3 prediction-market arbitrage checks, Polymarket Paper Trader

Others in the same category

Servers in the same category from other makers, sorted by stars.

Reading a card:↓ Downloads per weeki★ GitHub starsiThree pillars: reviews · checks · usageiUpdated = latest version published to the registryi

Solana MCP by Vybe

Solana MCP developer toolkit: wallets, trades, markets, PnL, transfers, onchain, swaps & API tools.

by vybenetworkGrowing★ 2.6K Stars for the whole repoUpdated 6 months ago

Runs in the cloud

Install

Oracle3 prediction-market arbitrage checks

Kalshi and Polymarket data, venue fees, no-arbitrage checks and paper execution for AI agents.

by YichengYang-EthanGrowing↓ 35/wk★ 569Updated 42 days ago

Runs on your computer

Install

Polymarket Paper Trader

Polymarket paper trading for AI agents: $10k paper money, real order books, official fees.

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Runs on your computer

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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.

obol

Pay the ferryman. Solana agent gateway via x402.

Obol is a pay-per-use Solana API for AI agents. No API keys, no subscriptions — agents pay per request in USDC using the x402 payment protocol. Solana's sub-cent transaction costs make micropayments viable for the first time.

Named after the coin placed on the tongue of the dead to pay Charon for passage across the River Styx. The original micropayment.

How it works

Agent requests data from a paid endpoint
Obol returns HTTP 402 with a payment requirement (amount, recipient, network)
Agent sends USDC on Solana matching the requirement
Agent retries with transaction proof in the X-PAYMENT header
Obol verifies on-chain and returns the data

No accounts. No tokens. No onboarding. Just pay and go.

Endpoints

Wallet Analytics

Endpoint	Price	Description
`GET /api/v1/wallet/:addr/overview`	$0.01	SOL balance, token count, total value
`GET /api/v1/wallet/:addr/portfolio`	$0.05	Full holdings with prices, NFTs, breakdown
`GET /api/v1/wallet/:addr/activity`	$0.05	Transaction history with categorization
`GET /api/v1/wallet/:addr/risk`	$0.10	Multi-factor risk assessment
`GET /api/v1/wallet/:addr/pnl`	$0.15	Token flow analysis, current values, P&L

Token Data

Endpoint	Price	Description
`GET /api/v1/token/:mint/price`	$0.005	Real-time price via Jupiter
`GET /api/v1/token/:mint/metadata`	$0.01	Name, symbol, supply, decimals

DeFi

Endpoint	Price	Description
`GET /api/v1/defi/swap/quote`	$0.005	Jupiter swap quote with route planning
`POST /api/v1/defi/swap/execute`	$0.25	Jupiter swap transaction builder
`GET /api/v1/defi/positions/:addr`	$0.10	DeFi positions — LSTs, LPs, lending
`GET /api/v1/defi/lst/yields`	$0.02	LST yield comparison across Solana

Free

Endpoint	Description
`GET /`	API info and pricing
`GET /health`	Service status
`POST /api/v1/rpc`	Proxied Helius RPC (allowlisted methods)

Agent Example

See examples/agent-client.ts for a full reference implementation. The key flow:

import { ObolAgent } from './examples/agent-client';

const agent = new ObolAgent(); await agent.discover(); // fetch pricing agent.loadWallet(process.env.AGENT_PRIVATE_KEY);

// Auto-discovers price, pays, and returns data const price = await agent.fetch('/api/v1/token/USDC_MINT/price');

Run in discovery-only mode (no wallet needed):

npx tsx examples/agent-client.ts

MCP Server

Obol ships as an MCP server — any AI agent that supports the Model Context Protocol can discover and call Obol's tools natively.

Install from npm

npm install -g obol-mcp

Claude Desktop / Claude Code

Add to your MCP config:

"mcpServers": { "obol": { "command": "npx", "args": ["-y", "obol-mcp"], "env": { "OBOL_URL": "https://obol-production.up.railway.app" } } } }

Or if developing locally:

"mcpServers": { "obol": { "command": "npx", "args": ["tsx", "/path/to/obol/src/mcp.ts"], "env": { "OBOL_URL": "http://localhost:3000" } } } }

Available MCP Tools

Tool	Description
`obol_wallet_overview`	SOL balance, token count, total value
`obol_wallet_portfolio`	Full holdings with prices and breakdown
`obol_wallet_activity`	Transaction history with categorization
`obol_wallet_risk`	Multi-factor risk assessment
`obol_wallet_pnl`	Token flow analysis and P&L
`obol_token_price`	Real-time price via Jupiter
`obol_token_metadata`	Name, symbol, supply, decimals
`obol_swap_quote`	Jupiter swap quote with routing
`obol_swap_execute`	Build swap transaction for signing
`obol_defi_positions`	LSTs, LPs, lending positions
`obol_lst_yields`	LST yield comparison
`obol_health`	API health check (free)
`obol_info`	Endpoint pricing and info (free)

Run locally

npm run mcp

Stack

Fastify 5 — high-performance HTTP
@x402/svm — official x402 SDK for Solana
Helius — RPC + DAS API
Jupiter — token prices + swap execution
Upstash Redis — cache + payment receipts
TypeScript — full type safety
Zod — runtime validation

Setup

git clone https://github.com/halfkey/obol.git

cd obol npm install cp .env.example .env

Edit .env with your Helius key and merchant wallet address

npm run dev

Testing

# Unit + integration tests (46 tests)

npm test -- --run

Smoke test against live deployment

npx tsx scripts/smoke-test.ts https://obol-production.up.railway.app

Manual payment test

npx tsx scripts/test-payment.ts

Environment

See .env.example. Key variables:

PAYMENT_MODE — mock (dev, auto-approve) or onchain (production)
PAYMENT_RECIPIENT_ADDRESS — your Solana wallet that receives USDC
HELIUS_API_KEY — Helius RPC access
UPSTASH_REDIS_REST_URL / TOKEN — cache layer

Roadmap

11 paid endpoints (wallet, token, DeFi, LST, P&L)
On-chain USDC verification with replay prevention
Test suite (46 vitest + 20-point smoke test)
Agent client reference implementation
GitHub Actions CI
WebSocket subscriptions for wallet monitoring
Dynamic congestion-based pricing
Multi-chain support

License

MIT

Obol

What it does

Install

Install Node.js

Sign up and create a Obol key

Open the Claude desktop app’s settings file

Paste these settings and save the file

Quit Claude and open it again

Try it

What you can do instead

Install Node.js

Sign up and create a Obol key

Open Terminal

Paste this command and press Enter

Type /mcp in Claude Code

Try it

Install Node.js

Sign up and create a Obol key

Click this button to open Cursor

Fill in your key

Open the AI chat in Cursor in Agent mode

Try it

Install Node.js

Sign up and create a Obol key

Click this button to open VS Code

Fill in your key

Open the AI chat in VS Code in Agent mode

Try it

Installed on your computer

Values you fill in

At a glance

Which apps can use it

Related guides

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

Discussion

User reviews

Compared with others in Crypto & blockchaini

Common questions

Others in the same category

Solana MCP by Vybe

Oracle3 prediction-market arbitrage checks

Polymarket Paper Trader

README from the maker

obol

How it works

Endpoints

Wallet Analytics

Token Data

DeFi

Free

Agent Example

MCP Server

Install from npm

Claude Desktop / Claude Code

Available MCP Tools

Run locally

Stack

Setup

Edit .env with your Helius key and merchant wallet address

Testing

Smoke test against live deployment

Manual payment test

Environment

Roadmap

License