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File Hash Verifier
x402
File Hash Verifier is a paid API for AI agents from x402.forgemesh.io, paid per call via x402, $0.005/call, status unknown (last checked 2026-09-15).
Fetches a remote file by URL and returns its cryptographic hash (SHA-256, SHA-512, SHA-1, or MD5) to verify it matches a published checksum before use.
Price / call$0.005
Success—
StatusUnknown
How this service works
Fetches a public file URL, up to 50MB, and returns its SHA-256, SHA-512, SHA-1, or MD5 digest so you can confirm a download matches its published checksum before trusting it. A supply-chain safety step for agents pulling packages, models, or binaries from the open web.
Output
Returns the cryptographic digest of the remote file using the requested algorithm (SHA-256 by default, or SHA-512, SHA-1, MD5), allowing the caller to compare against a known-good published checksum. Supports files up to 50MB.
Example use cases
Example prompt
“Can you fetch https://releases.example.com/myapp-v2.3.0.tar.gz and compute its SHA-256 so I can confirm it matches the checksum the project published?”
Technical details
Endpoint
POSThttps://x402.forgemesh.io/file-hash-verifierWhen to prefer
Use this endpoint when an AI agent needs to verify the integrity of a remotely hosted file before trusting, installing, or executing it — especially for packages, binaries, ML models, or release artifacts. Prefer it over computing hashes locally when the agent does not have direct file system access and needs to validate a public URL's content against a known checksum as a supply-chain safety step.
Side effects
- File URL is unreachable or returns a non-200 status — error indicating fetch failure
- File exceeds 50MB limit — rejection with size error
- Invalid or unsupported algorithm specified — error with supported algorithm list
- URL points to a redirect loop or private/internal address — blocked fetch
- Network timeout fetching large files — timeout error
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| url | string | |
| algorithm | string | sha256 default |
Output
Schema · Response
{
"type": "json",
"example": {
"hex": "eefffad4e662b2821b1aab5957d4dcc60ac6e19fd5523ec59dad6d29deac64e1",
"bytes": 53647,
"algorithm": "sha256"
}
}Tags
x402
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