Question 1

What is Junction?

Accepted Answer

Junction is a cross-chain DeFi exchange platform that unifies swap, bridge, perps, earn, and on-ramp behind a single API, SDK, and embeddable widget across EVM chains, Solana, and Hyperliquid.

Question 2

Which chains does Junction support?

Accepted Answer

Ethereum, Arbitrum, Optimism, Base, Polygon, BSC, Avalanche, Solana, and Hyperliquid L1.

Question 3

Does Junction have an API?

Accepted Answer

Yes. The OpenAPI 3.1 specification is available at https://junction.exchange/openapi.json. Junction also exposes a GraphQL gateway and an MCP server at https://api.junction.exchange/mcp.

Question 4

How much does Junction cost?

Accepted Answer

The Starter tier is free with 0.30% commission and 10 requests per second. The Growth tier uses volume-based commission of 0.15%-0.25% and 100 requests per second. Scale is a custom contract. Full pricing at https://junction.exchange/pricing.

Question 5

How do agents authenticate with Junction?

Accepted Answer

Agents can use an API key (Authorization: Bearer jxn_live_...) or OAuth 2.0 with authorization-code + PKCE or client-credentials flows. Discovery metadata is at https://junction.exchange/.well-known/oauth-authorization-server.

Question 6

Does Junction have an MCP server?

Accepted Answer

Yes. The MCP server is served at https://api.junction.exchange/mcp via Streamable HTTP. The server card with tools and capabilities is at https://junction.exchange/.well-known/mcp/server-card.json.

Question 7

How is Junction different from 1inch or Uniswap?

Accepted Answer

Junction adds native cross-chain bridging, Hyperliquid perps, Morpho earn vaults, and a MoonPay on-ramp behind one SDK, and exposes everything as an MCP server for AI agents. See https://junction.exchange/compare.

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