FAILED TRANSACTION SUPPORT SOLANA X402

A failed signature.
A safe next step.

Stop sending raw RPC logs into a retry loop. Utilia returns what landed, what changed, why it failed, and what an agent should do next for exactly $0.004 USDC.

Run one diagnosis Read the contract

$0.004per successful diagnosis

1signature required

8failure classes

0accounts or API keys

NO PRIVATE-KEY SETUP

Check free. Pay $0.004 on fetch.

Replace YOUR_SIGNATURE with a confirmed Solana signature. AgentCash manages the wallet, reads the exact x402 quote, pays in Base USDC, and retries the request.

Fund an AgentCash wallet Read the machine guide Open your live quote

agentcashBase USDC · exact $0.004

Paste the transaction signature

No payment happens until you run the generated fetch command.

npx -y agentcash@latest check \
  "https://api.utilia.ink/base/v1/transaction/YOUR_SIGNATURE"

npx -y agentcash@latest fetch \
  "https://api.utilia.ink/base/v1/transaction/YOUR_SIGNATURE" --yes

✓ price check is free ✓ wallet managed by AgentCash ✓ settlement receipt returned

NATIVE SOLANA OPTION

Bring a low-balance agent wallet.

The public client verifies the receiver, Solana USDC asset, network, and $0.004 ceiling locally before signing the payment.

Inspect the npm client Install the agent skill

terminalSolana USDC · $0.004 ceiling

export SOLANA_KEYPAIR_PATH=\
/absolute/path/to/low-balance-wallet.json

npx -y utilia-solana-agent@0.5.8 transaction \
  <solana-transaction-signature>

✓ receiver verified ✓ price verified ✓ wallet stays local

THE SUPPORT PACKET

Enough evidence to answer the user and fix the bot.

The result is deliberately structured so a support agent, transaction bot, or incident workflow can branch without guessing from raw log text.

01OUTCOME

What actually landed?

Confirmation state, slot, block time, network fee, compute units, raw error, and program logs.

02DELTAS

What changed?

SOL and token balance changes let the agent distinguish a charged network fee from a completed swap or transfer.

03CAUSE

Why did it fail?

Stable categories cover slippage, insufficient funds, compute budget, expired blockhash, account conflict, program error, and unknown cases.

04ACTION

What is safe to try next?

Guidance is retry-aware. It does not claim that replay is safe when block state, balances, quotes, or account locks may have changed.

STOP PARSING FAILURES BY HAND

Turn one signature into a support-ready answer.

No subscription. No vendor-issued credential. Pay only when the tool runs.

Run the command Prevent the next fee miss

A failed signature.A safe next step.