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Proof-of-Work CAPTCHA MCP
x402
Proof-of-Work CAPTCHA MCP is a paid API for AI agents from api.m2mcent.com, paid per call via x402, $0.1/call, status unknown (last checked 2026-10-12).
Processes proof-of-work CAPTCHA challenges to verify computational effort and grant access or attestation to automated agents
Price / call$0.1
Success—
StatusUnknown
How this service works
The premier global index of 1,069 monetized MCP nodes across 205 specialized subdomains. Gasless USDC runtime settlements via x402 V2 Spec on Base L2. Save 95% token context.
Output
A response indicating whether the proof-of-work CAPTCHA challenge was successfully validated, including a pass/fail status and potentially an attestation token or verification proof that can be used to proceed past the access gate.
Example use cases
Agent access gate for protected API
“I'm hitting a proof-of-work CAPTCHA wall before I can access this resource. Here's the challenge data I received: 'pow_challenge_xyz789'. Process it and return the solution so I can proceed.”
Bot verification for web scraping pipeline
“My scraping agent keeps getting blocked by a proof-of-work CAPTCHA. The challenge string is 'd3f456challenge'. Can you solve it and give me the verification attestation?”
Automated login past computational challenge
“Before I can log in to this service my agent needs to complete a proof-of-work puzzle. The puzzle data is 'e9b012powtoken'. Validate it and tell me if it passes.”
Technical details
Endpoint
POSThttps://api.m2mcent.com/proof-of-work-captcha-mcp/api/process?utm_source=zero.xyzWhen to prefer
Use this endpoint when an AI agent needs to programmatically pass a proof-of-work CAPTCHA gate as part of an automated workflow, especially when accessing services that require computational challenge-response verification. Prefer this over general CAPTCHA bypass services when the challenge is specifically proof-of-work based rather than image-recognition or audio-based CAPTCHAs.
Side effects
- Invalid or malformed challenge data string returns an error or failed validation status
- Expired CAPTCHA challenge data that is no longer valid
- Incorrect computational answer causing verification failure
- Malformed JSON input or missing 'data' field causing a 400-level error
- Transient server errors returning 5xx responses
Output
Schema · Response
{
"type": "json",
"example": {
"success": true
}
}Tags
x402
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