post
https://public-api.birdeye.so/wallet/v2/tx/first-funded
Retrieve the earliest transaction in which the wallet's post-transaction balance differs from its pre-transaction balance.
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Earliest funding transaction for wallets.
- Maximum number of wallets per request is
50. token_addressis optional; pass it when you want the first funding transaction for a specific token instead of the wallet's earliest funding event overall.- This endpoint helps attribute where a wallet was first funded from.
- Lite
- Starter
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- Enterprise
Solana
Compute Unit ⚙️
- This endpoint consumes
50 CUper request.
Use Cases 💡
- Find the earliest funding source for a wallet.
- Trace wallet provenance in fraud, sybil, or attribution investigations.
- Enrich whale, smart-money, or insider wallet research with first-funding context.
How to Use 🛠️
- Set
x-chain=solana. - Send up to
50wallet addresses in the POST body. - Optionally include
token_addresswhen funding provenance should be scoped to one token.
Best Practices ✅
- Use this endpoint after identifying a wallet cohort worth investigating, not as a first-pass screen.
- Keep wallet batches focused so attribution review remains manageable.
Limitations ⚠️
- Solana only.