Summary
Pulls real-time Solana priority fee data across six congestion levels, with pricing in both SOL and USD. The server connects to a hosted API at klymax402.com and surfaces current network conditions through SSE transport. Reach for this when you're building agents that need to estimate transaction costs, optimize fee strategies, or monitor Solana network congestion before submitting transactions. The x402 branding suggests integration with a broader crypto data platform, though the repository itself is minimal on implementation details. Useful for any Claude workflow that touches Solana transactions and needs to make informed decisions about gas pricing.
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Tools
Public tool metadata for what this MCP can expose to an agent.
1 tools
solana_get_priority_feesUse 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. 1. fees: object with 6 fee lev1 params
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. 1. fees: object with 6 fee lev
Parameters* required
programstringProgram ID to get program-specific fees (e.g. JUP6LkbZbjS1jKKwapdHNy74zcZ3tLUZoi5QNyVTaV4 for Jupiter). Optional — omit for global fees.
Solana Priority Fee Estimator API
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
| Tool | Method | Path | Price | Description |
|---|---|---|---|---|
solana_get_priority_fees | GET | /api/fees | $0.003 | Priority 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
| Name | Type | Required | Description |
|---|---|---|---|
program | string | no | Program 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 unitmin-- 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.
- Catalog: https://klymax402.com/llms.txt
- Full API reference: https://klymax402.com/llms-full.txt
- Live stats: https://klymax402.com/stats
License
MIT
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Plug Mailtrap into your AI workflow and let it handle the email.
Connect Mailtrap MCP →Agent, run crypto. Access onchain data & trade routes via 1inch.
Install now →Make coding agent sessions - Searchable, Shareable, Vendor-neutral & Scored.
Try For Free →Your agent targets a perfect 10 Code Health score. Deterministic. Every commit.
Try For Free →Integrate web data into your AI product. One API to scrape website & brand data.
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