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Andreax

Official registry AI and agents

270 pay-per-call AI tools for agents, paid via x402 (USDC on Base). No signup, no API keys.

Source code Website Documentation

What can you do with Andreax?

  • No accounts, no keys. The payment is the authentication.
  • Gasless for the payer. EIP-3009 transferWithAuthorization; the settlement gas is paid by Andreax.
  • Free preview. Every tool accepts ?sample=1 and returns an example output at no cost.
  • Discovery in one request. GET https://pagos.andreax.dev/.well-known/x402.json

Install

Add this to your client's MCP configuration (Claude Desktop: claude_desktop_config.json; Cursor: .cursor/mcp.json; VS Code and others use the same "mcpServers" shape).

Remote (streamable-http)
Claude Code 
claude mcp add --transport http andreax 'https://pagos.andreax.dev/mcp'
JSON configuration (Claude Desktop, Cursor, VS Code) 
{
    "mcpServers": {
        "andreax": {
            "type": "http",
            "url": "https://pagos.andreax.dev/mcp"
        }
    }
}

Documentation

From the project's README on GitHub, refreshed weekly. Links open on GitHub.

Contents
  1. Andreax — pay-per-call AI tools for agents (MCP + x402)
  2. Connect
  3. How payment works
  4. Tools (a selection of the most used — tools/list returns all 270)
  5. Links

Andreax — pay-per-call AI tools for agents (MCP + x402)

Remote MCP server: https://pagos.andreax.dev/mcp (Streamable HTTP, JSON-RPC)

Andreax is a remote MCP server with 270 pay-per-call tools for AI agents — text, code, documents, audio, web research and on-chain data. There is no signup and no API key: each call is paid individually with x402 in USDC on Base, from $0.001 per call.

  • No accounts, no keys. The payment is the authentication.
  • Gasless for the payer. EIP-3009 transferWithAuthorization; the settlement gas is paid by Andreax.
  • Free preview. Every tool accepts ?sample=1 and returns an example output at no cost.
  • Discovery in one request. GET https://pagos.andreax.dev/.well-known/x402.json

This repository only contains the public listing (README + directory metadata). The server itself is hosted; there is nothing to install.

Connect

Claude Desktop / Cursor / any MCP client (via mcp-remote)
{
  "mcpServers": {
    "andreax": {
      "command": "npx",
      "args": ["-y", "mcp-remote", "https://pagos.andreax.dev/mcp"]
    }
  }
}
Clients with native remote-MCP support

Add a remote server with URL https://pagos.andreax.dev/mcp (transport: Streamable HTTP, auth: none).

JavaScript SDK (handles the x402 payment for you)
npm install @andreax-tools/sdk

How payment works

  1. tools/list is free.
  2. tools/call without payment returns an x402 v2 challenge: exact amount, network (eip155:8453), asset (USDC 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913) and recipient.
  3. Your agent signs an EIP-3009 authorization for that amount and retries with it (argument x_payment, or the X-PAYMENT header over HTTP).
  4. The result comes back together with the on-chain settlement reference.

Your agent only needs a wallet with a little USDC on Base — no ETH.

Tools (a selection of the most used — tools/list returns all 270)

ToolWhat it doesPrice (USDC)
compressCompress a prompt into dense language (20–40% fewer tokens)0.001
count-tokensEstimate the token count of a text0.001
detect-languageDetect a text's language (ISO 639-1)0.001
summarizeFaithful bullet-point summary0.003
translate-toTranslate into any target language0.003
sentimentPositive / negative / neutral + confidence0.002
entitiesNamed-entity recognition as JSON0.003
classify-topicTopic classification for routing/tagging0.002
extract-jsonStructured data from free text0.004
json-fixRepair malformed JSON0.002
proofreadSpelling and grammar, same language0.002
rewrite-formalFormal, professional rewrite0.003
moderateFlag unsafe text0.002
injection-guardDetect prompt-injection in text / tool outputs0.010
text-to-sqlSQL from a natural-language request0.005
regexRegular expression from a description0.020
cronCron expression from a schedule in words0.020
code-reviewBugs, security issues, improvements0.020
code-genCode from a description0.008
read-urlClean readable text of a web page0.002
read-pdfText of a PDF from a URL0.003
ocrText from an image or scanned PDF (EN/ES)0.050
transcribeSpeech-to-text with language detection0.050
embeddingsEmbedding vector for search / RAG0.001
semantic-searchRank documents against a query0.003
researchWeb research with cited sources0.050
fact-checkVerdict + reasoning for a claim0.030
crypto-priceLive crypto price + 24h change0.005
wallet-balanceETH and USDC balance of a Base address0.002
fxCurrency conversion quote into USDC0.001
smart-documentOCR → summary → translation, one call0.100
meeting-minutesRecording → minutes, decisions, action items0.040

The live catalog (with the current prices, which are authoritative) is at https://pagos.andreax.dev/api/taller/peaje/catalogo.

Frequently asked questions

What is Andreax?

270 pay-per-call AI tools for agents, paid via x402 (USDC on Base). No signup, no API keys.

How do I install Andreax?

It runs as a remote server. In Claude Code: claude mcp add --transport http andreax 'https://pagos.andreax.dev/mcp'. For other clients, paste the JSON configuration from this page into their MCP settings.

Does Andreax need an API key?

Its registry entry lists no required key or secret. Some features may still need an account with the service it connects to.

Is Andreax open source?

Yes. Its code is on GitHub under the MIT license.

Who maintains Andreax?

It is published by moralito311-andr. AI.tn lists it but does not maintain or endorse it.

From the official MCP Registry. Listing is not an endorsement: review a server's code and permissions before giving it access to your data.