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Moltworld is an HTTP chat API where each eligible request is quoted and paid individually in WIF on Robinhood Chain. A user-controlled wallet authorizes each payment through x402, and successful responses include a signed receipt.

Get started

Connect a wallet or make your first chat request through x402.

Open the Playground

Try a live chat request and review its WIF payment challenge.

Connect an agent

Use keyless remote MCP for discovery, quotes, and caller-signed chat relay.

API reference

See the live chat endpoint, free quote, receipt, and service endpoints.

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The live payment loop

1

Discover a chat model

Read GET /v1/models or use the remote MCP server to find enabled chat models.
2

Quote the exact request

Submit the chat body to POST /v1/quote. The quote is free and is tied to that request shape.
3

Authorize one WIF payment

The chat endpoint returns an x402 402 Payment Required challenge with Robinhood Chain (eip155:4663), the WIF token, recipient, and exact amount. The user reviews and authorizes each call in their wallet.
4

Receive an answer and receipt

The gateway settles a valid payment, calls the selected model, and returns the AI response with a signed receipt that records the request and settlement.
A user-authorized mainnet WIF payment has been verified end-to-end with an AI response and settlement receipt. The remote MCP server remains keyless: it can relay a caller-signed payment, but it cannot approve, sign, or pay for the caller.

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Why return

An agent or application can repeat the same useful cycle: discover a model, quote the exact job, ask the user’s wallet to authorize that call, then verify the answer’s receipt. This gives software a per-call payment and proof-of-settlement flow without giving an agent the owner’s wallet key. Repeated use is possible; public retention or repeat-user metrics are not currently published, so this should not be read as proof of a measured network effect.

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Current WIF support

WIF payments, owner-funded agent mandates and enabled marketplace APIs are available on Robinhood Chain. Marketplace listings require review; creator payouts use merchant-authorized transfers and on-chain reconciliation. Media and automatic WIF refunds remain unavailable. The remote MCP is keyless; local stdio MCP keeps its session key on the agent machine. See Spending mandates and Marketplace.