A verifiable audit trail for agent-to-agent activity.
The agent web has no shared system of record. Dynamic Feed gives one: witness each event (or its hash) and it's signed and chained into an append-only log any party can verify — without trusting you, the counterparty, or us.
The call
Keyless over MCP, or one REST call with a free key. Every datapoint is provenance-stamped and citeable.
# Append an event to the audit trail (free key):
curl -s https://dynamicfeed.ai/v1/witness -H "X-API-Key: $KEY" -H "Content-Type: application/json" \
-d '{"content_hash":"","txn_ref":"workflow-step-7"}'
# Verify the chain head (keyless): GET https://dynamicfeed.ai/v1/notary/log/head Sample response
{ "schema": "txn-receipt/v1", "transparency": { "log_index": 4821, "prev_hash": "...", "entry_hash": "...",
"entry_url": "https://dynamicfeed.ai/v1/notary/log/4821" }, "signature": { "alg": "Ed25519", "key_id": "df-ed25519-6ca0de29113b" } }Why live data
Each witnessed event lands in a public hash chain: entry_hash = sha256(prev_hash + canonical(entry)), so altering a past entry breaks the later links. The result is a tamper-evident order of events any party can recompute and verify against /.well-known/keys. A supported workflow may request an RFC 3161 artifact for a chain-head digest; independent time evidence requires full token, digest and certificate-path validation. Dynamic Feed is a neutral recorder OUTSIDE the value path; it witnesses hashes and never moves value. It proves what was recorded and whether the signed chain is intact — not that any recorded claim is true.
Use it for
- A shared, neutral system-of-record for multi-agent workflows
- Reconstruct exactly what happened, in order, after the fact
- Compliance / dispute evidence neither side can rewrite
- Pairs with agent receipts + verifiable agent identity
FAQ
How is it tamper-evident?
Hash chaining makes later links fail if a past entry changes. Anyone can recompute the chain and verify the signed head.
Do you see the event contents?
Only if you send them. Send the sha256 instead and the log holds a hash — no contents, no PII.
Is this a blockchain?
No — it is a signed hash-linked log, not a coin or ledger of value. Dynamic Feed never moves or holds value.