Odel
Solana Priority Fee Estimator API

Solana Priority Fee Estimator API

@br0ski777TypeScriptMITUpdated 4 days ago

Solana priority fees at 6 levels, cost in SOL/USD, congestion. x402.

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Server endpointStreamable HTTPNo authProbed

Registry lists this as SSE; the live endpoint answered over Streamable HTTP.

https://solana-fees.api.klymax402.com/mcp

This is the third-party server itself — Odel doesn't run it. Hitting this URL directly talks straight to the upstream server with no auth or proxying. Connect through Odel to front it with managed auth.

Solana Priority Fee Estimator API

MCP Server x402 License: MIT

Solana priority fee estimates at 6 levels (min to max). Essential for every Solana transaction. Pay-per-call via x402 (USDC on Base L2) -- no API key, no signup, no rate-limit wall.

Part of the klymax402 marketplace -- 100 x402 micropayment APIs for AI agents, one wallet, USDC on Base.

Quickstart -- MCP

Add to your MCP client config (Claude Desktop, Cursor, ElizaOS, etc.):

{
  "mcpServers": {
    "solana-fees": {
      "url": "https://solana-fees.api.klymax402.com/mcp"
    }
  }
}

Quickstart -- HTTP (x402)

curl "https://solana-fees.api.klymax402.com/api/fees"
# -> 402 Payment Required, with an x402 payment challenge in the response body

Any x402-aware client (@x402/fetch, x402-agent-tools, ATXP) handles the 402 -> sign -> retry cycle automatically.

Tools

ToolMethodPathPriceDescription
solana_get_priority_feesGET/api/fees$0.003Priority fee estimates for Solana transactions

solana_get_priority_fees

Use this when you need priority fee estimates before sending a Solana transaction. Returns recommended compute unit prices at 6 levels based on recent network activity.

Parameters

NameTypeRequiredDescription
programstringnoProgram ID to get program-specific fees (e.g. JUP6LkbZbjS1jKKwapdHNy74zcZ3tLUZoi5QNyVTaV4 for Jupiter). Optional — omit for global fees.

Returns

  • fees -- object with 6 fee levels in microlamports per compute unit
  • min -- minimum fee observed (cheapest, may fail in congestion)
  • low -- 25th percentile fee (budget transactions)
  • medium -- 50th percentile fee (recommended default)
  • high -- 75th percentile fee (fast confirmation)
  • veryHigh -- 90th percentile fee (priority during congestion)
  • max -- maximum fee observed (guaranteed fast)

Example response:

{"fees":{"min":1,"low":100,"medium":1000,"high":5000,"veryHigh":50000,"max":500000},"slot":285432100,"program":"global","updatedAt":"2026-04-13T12:00:00Z"}

When to use: every Solana transaction to set the right priority fee. Essential for Jupiter swaps, NFT mints, token transfers, and program interactions.

Example agent prompts

  • "Priority fee estimates before sending a Solana transaction"

Payment

  • Protocol: x402 -- HTTP-native pay-per-call, no signup, no API key
  • Network: Base L2 (eip155:8453)
  • Asset: USDC
  • Facilitator: Coinbase CDP (primary), PayAI (fallback)
  • Also reachable via ATXP (OAuth-wrapped x402, RFC 9728 protected-resource metadata)

Part of klymax402

100 x402 micropayment APIs for AI agents -- one wallet, USDC on Base, zero signup.

License

MIT