Hash toolbox: MD5, SHA-256, SHA-512, Keccak, CRC32 and SRI

$0.02 per call · failed calls are never charged · no account or API key needed

Every common hash of one input in a single call: MD5, SHA-1, SHA-256, SHA-384, SHA-512, Keccak-256 (Ethereum), CRC-32, base64 SHA-256, and Subresource Integrity strings (sha256-, sha384-, sha512-) for <script integrity>. Hashes UTF-8 text, or 0x/hex bytes with hex=true. Cheaper than hashing one algorithm at a time. Use for checksums, cache keys, file integrity and comparing digests across systems.

Run it free (25 free calls) Buy credits by card (from $5) Example result (JSON)

Try it with your own inputs

Text to hash (up to 100,000 characters), or hex bytes with hex=true

Uses one of your 25 free calls. Nothing is charged, and a call that fails is not counted.

Inputs

NameTypeDescription
text (required)stringText to hash (up to 100,000 characters), or hex bytes with hex=true
hexstringtrue to treat text as hex bytes (0x prefix optional)

Request

Over HTTP, with a card key from /credits:

curl -H "Authorization: Bearer adt_…" "https://agent-data-tools.revmesh2074.workers.dev/pack/hash-toolbox?text=hello%20world"

Or one of your 25 free calls, no key:

curl "https://agent-data-tools.revmesh2074.workers.dev/pack/hash-toolbox?text=hello%20world&trial=1"

Without a key, the same URL answers 402 Payment Required with x402 and MPP terms, so an agent with a wallet pays per call in USDC (Base, Polygon, Arbitrum or Solana over x402; Base or Tempo over MPP) and retries.

Example result

{
  "bytes": 11,
  "md5": "5eb63bbbe01eeed093cb22bb8f5acdc3",
  "sha1": "2aae6c35c94fcfb415dbe95f408b9ce91ee846ed",
  "sha256": "b94d27b9934d3e08a52e52d7da7dabfac484efe37a5380ee9088f7ace2efcde9",
  "sha384": "fdbd8e75a67f29f701a4e040385e2e23986303ea10239211af907fcbb83578b3e417cb71ce646efd0819dd8c088de1bd",
  "sha512": "309ecc489c12d6eb4cc40f50c902f2b4d0ed77ee511a7c7a9bcd3ca86d4cd86f989dd35bc5ff499670da34255b45b0cfd830e81f605dcf7dc5542e93ae9cd76f",
  "keccak256": "0x47173285a8d7341e5e972fc677286384f802f8ef42a5ec5f03bbfa254cb01fad",
  "crc32": "0d4a1185",
  "sri": {
    "sha256": "sha256-uU0nuZNNPgilLlLX2n2r+sSE7+N6U4DukIj3rOLvzek=",
    "sha384": "sha384-/b2OdaZ/KfcBpOBAOF4uI5hjA+oQI5IRr5B/y7g1eLPkF8txzmRu/QgZ3YwIjeG9",
    "sha512": "sha512-MJ7MSJwS1utMxA9QyQLytNDtd+5RGnx6m808qG1M2G+YndNbxf9JlnDaNCVbRbDP2DDoH2Bdz33FVC6TrpzXbw=="
  },
  "base64": {
    "sha256": "uU0nuZNNPgilLlLX2n2r+sSE7+N6U4DukIj3rOLvzek="
  }
}

From an AI agent (MCP)

Add the MCP server to Claude, Cursor or any MCP client. This tool is pack_hash_toolbox, and the first 25 successful calls are free:

https://agent-data-tools.revmesh2074.workers.dev/mcp

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