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Overview

Thiqwave enables on-chain FX conversions and cross-chain transfers. Convert USDT to USDC, move assets between Ethereum and Polygon, or do both in a single transaction. Thiqwave routes through optimal liquidity paths with transparent pricing.

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Capabilities

Cross-stablecoin conversions — Convert USDT to USDC, USDC to DAI, and other stablecoin pairs on the same blockchain. Cross-chain transfers — Move USDT from Ethereum to Tron, USDC from Polygon to Ethereum, or other supported chains. Combined conversions — Convert stablecoins AND move across chains in a single operation (e.g., USDT Ethereum → USDC Polygon).

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Getting a quote

Request a quote before executing any conversion or transfer. Quotes show exact output amounts and are valid for 3 minutes. 
curl -X POST "https://api.thiqwave.com/v1/quotes" \
  -H "X-API-Key: your-api-key" \
  -H "Content-Type: application/json" \
  -d '{
    "type": "onchain_fx",
    "source_stablecoin": "USDT",
    "source_blockchain": "ethereum",
    "destination_stablecoin": "USDC",
    "destination_blockchain": "polygon",
    "amount": "1000.00"
  }'

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Response

{
  "id": "quote_fx_001",
  "type": "onchain_fx",
  "source_stablecoin": "USDT",
  "source_blockchain": "ethereum",
  "source_amount": "1000.00",
  "destination_stablecoin": "USDC",
  "destination_blockchain": "polygon",
  "destination_amount": "999.00",
  "fee": "1.00",
  "expires_at": "2026-04-08T12:03:00Z",
  "created_at": "2026-04-08T12:00:00Z"
}
Stablecoin amounts are in human-readable format (e.g., "1000.00" = 1,000 USDT). The quote shows the optimal route Thiqwave will use. Routes change based on liquidity.

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Cross-stablecoin conversion (same chain)

Convert USDT to USDC on Ethereum without moving to another blockchain. 
curl -X POST "https://api.thiqwave.com/v1/onchain_fx" \
  -H "X-API-Key: your-api-key" \
  -H "Content-Type: application/json" \
  -d '{
    "quote_id": "quote_fx_001",
    "source_stablecoin": "USDT",
    "source_blockchain": "ethereum",
    "source_amount": "1000.00",
    "destination_stablecoin": "USDC",
    "destination_blockchain": "ethereum",
    "recipient_address": "0x1234567890123456789012345678901234567890",
    "metadata": {
      "conversion_id": "conv_12345"
    }
  }'

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Cross-chain transfer (same stablecoin)

Move USDT from Ethereum to Tron without converting to a different stablecoin. 
curl -X POST "https://api.thiqwave.com/v1/onchain_fx" \
  -H "X-API-Key: your-api-key" \
  -H "Content-Type: application/json" \
  -d '{
    "quote_id": "quote_fx_001",
    "source_stablecoin": "USDT",
    "source_blockchain": "ethereum",
    "source_amount": "1000.00",
    "destination_stablecoin": "USDT",
    "destination_blockchain": "tron",
    "recipient_address": "TR1234567890123456789012345678901234567890",
    "metadata": {
      "bridge_id": "bridge_67890"
    }
  }'

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Combined conversion + cross-chain

Convert USDT to USDC AND move from Ethereum to Polygon in a single operation. 
curl -X POST "https://api.thiqwave.com/v1/onchain_fx" \
  -H "X-API-Key: your-api-key" \
  -H "Content-Type: application/json" \
  -d '{
    "quote_id": "quote_fx_001",
    "source_stablecoin": "USDT",
    "source_blockchain": "ethereum",
    "source_amount": "1000.00",
    "destination_stablecoin": "USDC",
    "destination_blockchain": "polygon",
    "recipient_address": "0x1234567890123456789012345678901234567890",
    "metadata": {
      "operation_id": "op_combined_001"
    }
  }'

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Response

{
  "id": "fx_abc789",
  "quote_id": "quote_fx_001",
  "status": "pending",
  "source_stablecoin": "USDT",
  "source_blockchain": "ethereum",
  "source_amount": "1000.00",
  "destination_stablecoin": "USDC",
  "destination_blockchain": "polygon",
  "destination_amount": "999.00",
  "recipient_address": "0x1234567890123456789012345678901234567890",
  "metadata": {
    "operation_id": "op_combined_001"
  },
  "created_at": "2026-04-08T12:00:30Z"
}

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Operation statuses

pending — Operation created, waiting to start
swapping — Converting between stablecoins
bridging — Moving across blockchains
completing — Delivering to recipient
completed — Operation finished
failed — Operation failed

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Tracking operations

Monitor operations through webhooks for real-time updates. 
{
  "type": "onchain_fx.completed",
  "data": {
    "id": "fx_abc789",
    "status": "completed",
    "destination_amount": "999.00",
    "transaction_hash": "0x123abc456def",
    "completed_at": "2026-04-08T12:05:00Z"
  }
}

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Supported conversions and routes

Thiqwave supports major stablecoin pairs and cross-chain routes:
SourceDestinationSupported
USDT (Ethereum)USDC (Ethereum)Yes
USDC (Polygon)USDT (Polygon)Yes
USDT (Ethereum)USDT (Polygon)Yes
USDT (Ethereum)USDT (Tron)Yes
USDC (Ethereum)USDC (Polygon)Yes
DAI (Ethereum)USDC (Ethereum)Yes
Contact support for additional conversion pairs.

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Best practices

  • Always get a quote first — Understand fees and output before executing
  • Use exact amounts — Ensure source amount matches the quote
  • Validate recipient addresses — Double-check wallet addresses before submission
  • Use metadata — Track operations with transaction or conversion IDs
  • Monitor webhooks — React when operations complete
  • Handle failures — Some conversions may fail due to liquidity; have retry logic
  • Consider slippage — Quotes may differ slightly due on-chain slippage; set tolerance in your system

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Error handling

Common issues and resolutions:
ErrorCauseResolution
Insufficient liquidityRoute has low liquidityRequest a new quote or use different pair
Quote expiredMore than 3 minutes have passedRequest a new quote
Invalid recipient addressAddress format incorrectVerify and correct the address format
Unsupported pairStablecoin or blockchain not supportedCheck supported conversions table
Network congestionBlockchain network is congestedRetry after waiting

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Next steps