Is the Solana Priority Fee Estimator API MCP server free to use?

Yes. Solana Priority Fee Estimator API is listed on AllMCPs as a free, open Model Context Protocol server you can install into Claude Desktop, Cursor, or any MCP-compatible client.

Is the Solana Priority Fee Estimator API MCP server free to use?

Yes. Solana Priority Fee Estimator API is listed on AllMCPs as a free, open Model Context Protocol server you can install into Claude Desktop, Cursor, or any MCP-compatible client.

Solana Priority Fee Estimator API

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

Quick Install

Automated & IDE Setup

Copy the AI prompt to install this server into Claude Code, Cursor, or another agent — or use 1-click editor setup below.

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Manual Client & Custom JSON ConfigExpand JSON ▾

Install Config Generator

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claude_desktop_config.json

{
  "mcpServers": {
    "solana-priority-fee-estimator-api": {
      "command": "npx",
      "args": [
        "-y",
        "solana-priority-fee-estimator-api"
      ]
    }
  }
}

💡 Paste into ~/Library/Application Support/Claude/claude_desktop_config.json (macOS) or %APPDATA%\Claude\claude_desktop_config.json (Windows)

Documentation Overview

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.):

config.json

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

Quickstart -- HTTP (x402)

Terminal

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 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:

config.json

{"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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Frequently Asked Questions about Solana Priority Fee Estimator API

Add the following block to your claude_desktop_config.json under mcpServers: "mcpServers": { "solana-priority-fee-estimator-api": { "command": "npx", "args": ["-y", "Solana Priority Fee Estimator API"] } }

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Technical Specs & Signals

CategoryFinance & Fintech

27Quality signal: Emerging · 27/100How this signal is calculated ▾

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More in 💰 Finance & Fintech →Best MCP servers for Finance & Fintech →Alternatives to Solana Priority Fee Estimator API →Install in Claude Desktop Install in Cursor Install in VS Code

Documentation Overview

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.):

config.json

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

Quickstart -- HTTP (x402)

Terminal

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 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:

config.json

{"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

Frequently Asked Questions about Solana Priority Fee Estimator API