Anchor data hashes to public blockchains with a simple API. Merkle tree batching. Multi-chain support. Verifiable by anyone.
curl -X POST https://hashanchor.fengdeagents.site/v1/hashes \
-H "Authorization: Bearer ha_your_api_key" \
-H "Content-Type: application/json" \
-d '{"hash": "0xYOUR_SHA256_HASH"}'A complete toolkit for anchoring, verifying, and proving data integrity on public blockchains.
Submit hashes with a single POST call. Get started in minutes with clear documentation.
Hundreds of hashes batched into one on-chain transaction. Cost-efficient anchoring at scale.
Anchor to Polygon, Base, BSC, and more. Choose the chain that fits your needs.
Anyone can verify a hash — no account needed. Full transparency and trust.
Real-time callbacks when your hashes are anchored on-chain. Never miss an event.
Download PDF certificates and JSON receipts with full Merkle proof paths.
MCP server, TypeScript SDK, and one-step provisioning. Built for AI agents from the ground up.
Device-side signing, signature verification, and edge gateway support. Trusted data from the source.
Turn device operations and BTC revenue into verifiable credit scores. Revenue-backed lending and DeFi integration.
From submission to on-chain proof in four simple steps.
POST your SHA-256 data hash via the REST API with your API key.
Hashes are aggregated into a Merkle tree for cost-efficient anchoring.
The Merkle root is written to the blockchain smart contract.
Anyone can verify the hash on-chain with the Merkle proof receipt.
Check if a hash has been anchored on-chain. No account required.
Start free. Scale as you grow.