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SolMachina Priority Fee Oracle
x402
SolMachina Priority Fee Oracle is a paid API for AI agents from api.solmachina.com, paid per call via x402, $0.002/call, status unknown (last checked 2026-09-14).
Returns current Solana network priority fee percentiles and suggested fee bands (economy, normal, fast, aggressive) for optimal transaction prioritization
Price / call$0.002
Success—
StatusUnknown
How this service works
Before an AI agent executes on Solana, it asks SolMachina: risk + a decision (EXECUTE/REVIEW/REJECT) + an SMRI score + a signed receipt, paid per call over x402 in USDC. Trust-first — cites every source, says 'unknown' over guessing. No account, no API key.
Output
Returns a JSON object with the fee unit (typically micro-lamports), four percentile fee levels (p50, p75, p90, p99) reflecting recent on-chain activity, and four named suggested bands — economy, normal, fast, and aggressive — that the agent can directly use as the prioritizationFeeLamports value when submitting a Solana transaction.
Example use cases
Optimizing urgent DeFi swap fees
“I'm about to execute a time-sensitive token swap on Solana — what priority fee should I set to make sure it lands in the next block? Check the aggressive and fast bands for me.”
AMM pool-specific fee estimation
“I'm submitting a liquidity transaction that write-locks this Raydium pool: 58oQChx4yWmvKnvse9NqhUiLtKdnzjUcpAVQeZuKe5JF — what priority fee should I use based on recent activity on that pool?”
Cost-conscious background transaction
“I need to send a low-urgency Solana transaction and want to minimize fees — what's the economy fee band on the network right now so I'm not overpaying?”
Technical details
Endpoint
GEThttps://api.solmachina.com/v1/priority-feeWhen to prefer
Use this endpoint when an AI agent needs to set or recommend a Solana priority fee before submitting a transaction, especially in DeFi contexts where landing speed matters. It is superior to hard-coded fee defaults or generic RPC fee estimates because it returns percentile breakdowns and named bands that map directly to transaction urgency levels. The optional account-scoping feature makes it especially valuable for AMM interactions where pool-specific contention differs from global network fees. Requires no API key — payment is per-call via x402 USDC on Solana mainnet.
Side effects
- Invalid or non-base58 account address returns a 400 error
- Accounts parameter references an address with no recent write-lock history, yielding a sparse or fallback sample
- Network congestion or RPC unavailability may cause 503 responses
- Payment failure over x402 (insufficient USDC balance) blocks the call
- Stale fee data if sampled during a low-activity window may underestimate required fees during sudden congestion spikes
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| accounts | string | Optional comma-separated base58 addresses to narrow the fee sample to transactions that write-locked them (e.g. a hot AMM pool). |
Output
Schema · Response
| Field | Type | Description |
|---|---|---|
| unit | string | |
| percentiles | object | |
| suggestedBands | object |
Tags
x402
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