PayperAnswer

app.payperworkPublished by payperwork.appOfficial publisherv0.4.1Updated Nov 1, 2026

Pay-per-call chat on GPT-6.1, Claude, Gemini and Grok over x402. No API key; a failed call is free.

VerifiedStreamable HTTPWeb executableFinanceAI & ML

Overview

AI-generated overview

Remote MCP server offering pay-per-call chat completions on frontier models (Claude, GPT, Gemini, Grok), billed in USDC over x402 with no API key.

What you can do
  • Run chat completions on frontier models such as Claude, GPT, Gemini and Grok, with OpenAI-style messages, max_tokens and temperature
  • List available models with provider rates, the pricing formula and limits, free of charge
  • Get a per-request price quote in the 402 response before a paid call runs
When to use it
Useful when an assistant needs occasional access to frontier chat models without signing up for provider accounts or managing API keys, and paying per successful call in USDC is acceptable.
Requirements
Remote streamable HTTP endpoint; no account, API key or environment variables declared. A wallet able to pay in USDC over x402 is needed for paid chat calls; the models tool is free. Network access to the endpoint and to the model providers is required.
Before you install
Chat calls spend real money in USDC from the paying wallet, which is also the identity and cannot be revoked; each call is priced in the 402 before it runs and charged only if it succeeds. Prompts are sent to the model's provider and are not stored by the service. Thinking models spend part of max_tokens on reasoning.

Installation

In SourceWeft

  1. Open PayperAnswer 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/app.payperwork%2Fai/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": {
    "payperanswer": {
      "type": "http",
      "url": "https://payperwork.app/ai/mcp"
    }
  }
}

Tools

2

chat

Chat

Chat completion on a frontier model: GPT-6.1 Sol and Terra, GPT-5.5, Claude Sonnet 5.5 and Haiku 5.5, Gemini 3.8 Flash, Grok 4.7, GPT-6 Luna (default anthropic/claude-haiku-5.5; see the models tool). Same shape as OpenAI chat: messages, optional max_tokens (default 1024, max 8192), temperature, tools. Price is quoted per call from your input size and max_tokens: (estimated input tokens x input rate + max_tokens x output rate) x 1.4 + $0.0005, minimum $0.002; the 402 states the exact amount. Charged only if the model call succeeds. Thinking models (GPT-5.5, Gemini, Grok, gpt-oss) spend part of max_tokens on reasoning: give them room, or set reasoning_effort (default low). Prompts go to the model's provider and are not stored by PayperWork. No streaming.

Parametersstopmodeltoolstop_pmessagesrequiredmax_tokenstemperaturetool_choiceresponse_formatreasoning_effort

models

Models

List the available models with provider rates, the pricing formula and limits. Free.

Takes no parameters.

Version history

2
  1. v0.4.1LatestNov 1, 2026
  2. v0.4.0Nov 1, 2026

Score

72% 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

    Publish an icon in the registry entry.

  • 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.

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