mashedPrepare the email address.
Trim surrounding whitespace and lowercase the entire address.
Live · Hashed email resolution
Resolve
hashed emails
Check a batch of SHA-256 hashed emails for exact matches. Each key returns a match, a masked match, or a miss.
+ A WORLD OF CONNECTIONS
Emails → hashesA fingerprint for each address.
Hover to reveal the connectionsTouch to reveal · Two fingers to rotate & pinch
SHA-256 · EXACT-MATCH LOOKUPHOW IT WORKS
Generate a SHA-256 hash.
Encode the normalized address as UTF-8 and generate its 64-character hex hash.
Check for an exact match.
Submit the hash. A visible match returns the email and its sha256_lc_hem field.
Email resolution
LIVE API · BATCH LOOKUPFrom hash
to match
Send up to 100 hashed emails per request. Results follow the order of your keys. Each submitted key costs one credit, including misses and masked matches.
POST /api/v1/resolve
{
"keys": ["542d240129883c019e106e3b1b2d3f3cb3537c43c425364de8e951d5a3083345"]
}EXAMPLE RESULTMATCH
{
"found": true,
"masked": false,
"hit": { "row": {
"email": "person@example.com",
"sha256_lc_hem": "542d240129883c019e106e3b1b2d3f3cb3537c43c425364de8e951d5a3083345"
} }
}Synthetic example with abbreviated response. See the full response schema.
Look up a key
Sign in to run lookups from your dashboard, or call the API with a key you create there. Enter hashed emails or let the browser hash email addresses before sending them.
Email to HEM converter
Trim, lowercase, and hash an email address in your browser. The converter makes no network request.
Explore MashedMesh
Plan an integration
Audience calculator
Preview planned audience counts by ZIP code, state, and job title.
API for agents
Use the OpenAPI contract and a runnable example to build an agent or another HTTP client.
Handling lookup data
Read how the tools handle inputs and what to consider before submitting hashed emails.
Approval required
Start with 1,000 credits
Apply with a work email and describe how you’ll use email resolution. Approved applicants receive credits for a pilot key.
Apply for the pilot