SwapTitan Swap API — free, non-custodial, no API key

Swap on Solana and 7 EVM chains with one free REST API. Every endpoint returns an unsigned transaction — you sign with your own wallet. The server never holds funds, never sees keys. No registration, no API key, no KYC.

Base URL: https://swaptitan.net

Run as MCP server (stdio)

A self-contained MCP server — no dependencies, Node >= 18:

node mcp-server.js

18 tools (prices, quotes, Solana + EVM swaps, routing, priority fees, Hyperliquid, rug checks). The protocol layer runs locally; tool calls hit the free public API. Hosted alternative: https://swaptitan.net/mcp (streamable HTTP, no auth).

Solana swap (Jupiter aggregator)

# Quote
curl "https://swaptitan.net/v1/sol/quote?from=sol&to=usdc&amount=0.1"

# Build unsigned swap transaction for YOUR wallet
curl -X POST https://swaptitan.net/v1/sol/swap \
  -H "Content-Type: application/json" \
  -d '{"from":"sol","to":"usdc","amount":0.1,"userPublicKey":"<YOUR_WALLET>"}'

Response contains swapTransaction (base64, unsigned) — deserialize, sign, send to any RPC:

import { VersionedTransaction, Connection } from '@solana/web3.js';
const { swapTransaction } = await (await fetch('https://swaptitan.net/v1/sol/swap', {
  method: 'POST', headers: { 'Content-Type': 'application/json' },
  body: JSON.stringify({ from: 'sol', to: 'usdc', amount: 0.1, userPublicKey: wallet.publicKey.toString() })
})).json();
const tx = VersionedTransaction.deserialize(Buffer.from(swapTransaction, 'base64'));
tx.sign([wallet]);
await new Connection('https://api.mainnet-beta.solana.com').sendRawTransaction(tx.serialize());

• from / to: sol, usdc, usdt or any base58 mint (memecoins, pump.fun tokens — anything Jupiter routes)
• amount (human units for sol/usdc/usdt) or amountRaw (base units, any mint)
• slippageBps: 1–1000, default 50
• Pricing: free API — 0.3% routing fee + small flat network service fee inside the transaction (disclosed in the response as feeBps and serviceFeeLamports)

EVM swap — Ethereum, Base, BSC, Arbitrum, Polygon, Optimism, Avalanche (KyberSwap aggregator)

# Quote
curl "https://swaptitan.net/v1/evm/base/quote?tokenIn=native&tokenOut=0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913&amount=0.1"

# Build unsigned calldata
curl -X POST https://swaptitan.net/v1/evm/base/swap \
  -H "Content-Type: application/json" \
  -d '{"tokenIn":"native","tokenOut":"0x8335...2913","amount":0.1,"account":"<YOUR_0x_WALLET>"}'

Response: tx: { to, data, value } — sign and broadcast with your own wallet (ethers/viem/web3.js). ERC-20 input requires prior approval to tx.to. Pricing: free API, 0.3% routing fee in calldata.

Universal cross-chain router

One call compares all rails (cross-chain exchange bridge, direct H2H liquidity, Solana DEX) and returns the best route with ready-to-execute parameters — including hard pairs like eth -> xmr:

curl "https://swaptitan.net/v1/route?from=eth&to=xmr&amount=0.5"

Solana priority-fee oracle

Live compute-unit price tiers, refreshed continuously — call before sending any Solana transaction:

curl "https://swaptitan.net/v1/sol/priority-fee"
# -> { "recommended": { "low": ..., "medium": ..., "high": ..., "turbo": ... }, "computeUnitsHint": {...} }

MCP server (AI agents)

Point any MCP-capable agent at https://swaptitan.net/mcp (JSON-RPC 2.0, tools/list + tools/call). Tools include sol_swap, evm_swap, smart_route, sol_priority_fee, swap_create, swap_status, get_prices, rug_check and more.

{ "mcpServers": { "swaptitan": { "url": "https://swaptitan.net/mcp" } } }

Discovery endpoints: /llms.txt · /.well-known/agent-skills/index.json · /.well-known/mcp/server-card.json

More

• 1288+ asset cross-chain swaps: GET /v1/swap/quote?from=btc&to=eth&amount=1
• Live prices: GET /v1/prices
• XMR/Monero no-KYC swaps: GET /v1/xmr/quote?from=sol&amount=1&to=xmr
• Docs: https://swaptitan.net/developers

Rate limits & fair use

Public endpoints are rate-limited per IP (20–60/min depending on endpoint). Fees are always disclosed in the API response. All transactions are non-custodial: nothing executes until you sign.