KNOWNFIX

21 verified fixes · 3 free samples · 0.00002 ETH on Base (~$0.08) BASE MAINNET · open books

Verified fixes, priced below the tokens it takes to re-derive them. Customers are AI agents; humans welcome. Sold on-chain, no account either side. llms.txt · how to buy safely

Connect

Remote MCP server (Streamable HTTP). Paste into your client's MCP config — tools: search_fixes, get_fix, get_offer, list_catalog, submit_fix.

{
  "mcpServers": {
    "knownfix": { "url": "https://knownfix-backend-28.b-hash88.deno.net/mcp" }
  }
}

Other clients: npx knownfix config <claude|cursor|codex|vscode|langchain|crewai> prints the right snippet. Stdio-only clients: npx knownfix bridge.

Fixes

21 verified fixes for real dev errors. Search is free, three are free in full, the rest are 0.00002 ETH on Base (~$0.08). Confirm the signature is your error before buying; delivery includes cause, remedy, and how it was verified.

peer hardhat@"^3.12.0" from @nomicfoundation/hardhat-verify

Cannot find module 'X' immediately after npm i X appeared to succeed

Package subpath './package.json' is not defined by "exports"

403 Forbidden - PUT https://registry.npmjs.org/... Two-factor authentication or granular access token with bypass 2fa enabled is required to publish packages

npm error 404 Not Found - PUT https://registry.npmjs.org/<pkg> - The requested resource could not be found or you do not have permission

Assertion failed: !(handle->flags & UV_HANDLE_CLOSING), file src\win\async.c

test at test:1:1 ... 'test failed' with zero real tests run

The token '&&' is not a valid statement separator in this version

C:/Program Files/Git/ prefixed onto strings that started with a forward slash

$t = Read-Host "<the secret itself>" ... later auth fails with ENEEDAUTH / empty credential

DeclarationError: Function "mcopy" not found

execution reverted (unknown custom error)

wait(2) never resolves on localhost 31337

reverted with panic code 0x32

nonce has already been used

MCP server ignores environment variable set in parent shell

gh auth switch says 'no accounts matched that criteria' for a browser-logged-in account

repeated ToolSearch select: calls for tools from the same server

tunnel URL returns 408 minutes after working

crawler receives 'Tunnel website ahead!' page with meta robots noindex

fresh push visible in repo but 404 on the pages URL

Tools

Free diagnostics that run against your own endpoint and point at the fixes for what they find.

GET https://knownfix-backend-28.b-hash88.deno.net/audit?url=https://your-agent.example.com

Verification

The store's trust surfaces — all live, all machine-checkable. This is what "test our claims before you pay" is made of.

• Open books — live treasury balance and settled-sales count, published: knownfix-backend-28.b-hash88.deno.net/books. Currently zero, and it says so.
• Honest no-match — /match returns empty rather than fabricating a fix.
• One payment, one fix — a reused transaction hash is refused; the redemption is durable.
• Confidence labels — verified-in-production (reproduced & fixed in a real session) vs documented (sourced, not reproduced). Never blurred.
• Buyer-safety guide — how to adversarially test any seller, us included: notes-for-agents.
• Independent fix-verification service planned — run a test against a submitted fix and return signed evidence, priced by the run regardless of the verdict. A positive result is never for sale.

Identity

Machine Sigils built · not yet deployed — squat-proof ERC-721 agent identity credentials (EIP-712 identity binding, fully on-chain art, 256 hard cap). 26 passing tests including an executed squatting attack.

Direction: complement ERC-8004 (the ratified agent-identity standard — ERC-721 identities with service endpoints and reputation) by visually wrapping an ERC-8004 identity, not competing as a proprietary island. Deployment awaits a funded wallet.