Penny x402 utilities

io.github.pennyopsPublished by GitHub account pennyopsv0.1.0Updated Nov 7, 2026

Pay-per-call dev utilities (hash, base64, uuid, URL, time, NIP-19, BOLT11) via x402 USDC on Base.

VerifiedStreamable HTTPWeb executableFinanceDeveloper Tools

Overview

AI-generated overview

Remote MCP server offering pay-per-call developer utilities: hashing, base64, UUIDs, slugs, URL parsing, time conversion, and Nostr/Lightning decoding.

What you can do
  • Compute hex digests of strings with several algorithms
  • Encode or decode base64, including URL-safe mode
  • Generate UUID v4 lists and turn strings into URL slugs
  • Parse URLs into components and query parameters
  • Convert between epoch and ISO 8601 UTC timestamps
  • Decode Nostr NIP-19 identifiers and Lightning BOLT11 invoices
When to use it
Useful when an assistant needs quick, one-off encoding, hashing, identifier or timestamp conversions without a local toolchain, and when paying a tiny per-call fee in USDC is acceptable.
Requirements
A remote streamable HTTP endpoint; no package, account, API key or environment variable is declared. Each tool call is paid at 0.001 USDC on Base via x402, so a wallet capable of x402 payments is needed.
Before you install
Every call costs 0.001 USDC on Base, so usage spends real money and requires a funded wallet. Inputs are sent to a third-party server, so avoid passing secrets or sensitive data to the hashing, encoding or decoding tools.

Installation

In SourceWeft

  1. Open Penny x402 utilities in the dashboard and add it to a workspace.
  2. 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/io.github.pennyops%2Fpenny-x402-utils/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.

Read the install guide the agent follows

Other MCP clients

Add this to your client's mcpServers config.

{
  "mcpServers": {
    "penny-x402-utilities": {
      "type": "http",
      "url": "https://pennyagent.pythonanywhere.com/mcp"
    }
  }
}

Tools

8

hash

Hex digest of a string. args: s, alg (sha256|sha512|sha1|md5|sha3_256|sha3_512|blake2b|blake2s). Paid: 0.001 USDC on Base via x402 at https://pennyagent.pythonanywhere.com/paid/hash.

Takes no parameters.

base64

Base64 encode/decode. args: s, mode (enc|dec), url (1 for urlsafe). Paid: 0.001 USDC on Base via x402 at https://pennyagent.pythonanywhere.com/paid/base64.

Takes no parameters.

uuid

List of UUID v4. args: n (1..100). Paid: 0.001 USDC on Base via x402 at https://pennyagent.pythonanywhere.com/paid/uuid.

Takes no parameters.

slug

URL slug of a string. args: s. Paid: 0.001 USDC on Base via x402 at https://pennyagent.pythonanywhere.com/paid/slug.

Takes no parameters.

urlparse

URL components and query params. args: u. Paid: 0.001 USDC on Base via x402 at https://pennyagent.pythonanywhere.com/paid/urlparse.

Takes no parameters.

timeconv

Epoch <-> ISO 8601 UTC. args: t. Paid: 0.001 USDC on Base via x402 at https://pennyagent.pythonanywhere.com/paid/timeconv.

Takes no parameters.

nip19

Decode Nostr NIP-19 (npub/note/nprofile/nevent/naddr). args: s. Paid: 0.001 USDC on Base via x402 at https://pennyagent.pythonanywhere.com/paid/nip19.

Takes no parameters.

bolt11

Decode a Lightning BOLT11 invoice. args: i. Paid: 0.001 USDC on Base via x402 at https://pennyagent.pythonanywhere.com/paid/bolt11.

Takes no parameters.

Version history

1
  1. v0.1.0LatestNov 7, 2026

Score

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.