Solana Fees X402

What is Solana Fees X402?

Solana Fees X402 is a server that provides Solana priority fee estimates at 6 levels (min to max). It integrates with the x402 pay-per-call protocol (USDC on Base L2) and requires no API key, signup, or rate-limit wall. It is part of the klymax402 marketplace of 100 x402 micropayment APIs for AI agents.

How to use Solana Fees X402?

Add the MCP server URL (https://solana-fees.api.klymax402.com/mcp) to an MCP client config (Claude Desktop, Cursor, ElizaOS, etc.). Alternatively, make an HTTP GET request to /api/fees; an x402-aware client (e.g., @x402/fetch) automatically handles the payment challenge. The tool solana_get_priority_fees accepts an optional program parameter for program-specific fees.

Key features of Solana Fees X402

• Provides 6 priority fee levels: min, low, medium, high, veryHigh, max.
• Pay-per-call via x402 – no signup, no API key, no rate-limit wall.
• Returns current slot, update timestamp, and optional program-level fees.
• Part of the klymax402 marketplace – 100 x402 APIs for AI agents.
• One wallet, USDC on Base L2 for all payments.

Use cases of Solana Fees X402

• Setting the right priority fee before sending any Solana transaction.
• Avoiding failed transactions during congestion by using higher fee estimates.
• Automating fee estimation in AI agents performing Jupiter swaps, NFT mints, or token transfers.
• Estimating program-specific fees (e.g., Jupiter, Raydium) to optimize transaction costs.

FAQ from Solana Fees X402

What does it cost to use Solana Fees X402?

Each call costs $0.001, paid via the x402 protocol (USDC on Base L2). No signup or API key is required.

What priority fee levels are returned?

The API returns 6 levels: min (cheapest, may fail in congestion), low (25th percentile), medium (50th percentile, recommended), high (75th percentile), veryHigh (90th percentile), and max (guaranteed fast).

Can I get fees for a specific Solana program?

Yes, the optional program parameter (e.g., JUP6LkbZbjS1jKKwapdHNy74zcZ3tLUZoi5QNyVTaV4 for Jupiter) returns program-specific fee estimates. Omit it for global fees.

How do I pay for API calls?

Payment uses the x402 protocol – HTTP-native pay-per-call. The facilitator is Coinbase CDP (primary) with PayAI as fallback, all on Base L2 using USDC.

Is there a rate limit or signup?

No. There is no rate-limit wall, no signup, and no API key. You pay $0.001 per successful call.