Sigilbase

Signed webhooks, sealed on arrival.

Sending records to Sigilbase through signed webhooks: every delivery receipted, every gap declared, and evidence your auditor verifies offline without an account.

Receivers ship in waves, and this one is in the first. Until then, anything that can send JSON reaches Sigilbase through the events API today.

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  • Status. First wave.
  • Collected by. A receiver you point at.
  • Connects with. The vendor's webhook secret, held sealed by Sigilbase.
  • Category. Receivers and the API.

What can be sent through Signed webhooks

Each record becomes an event in the ledger, kept exactly as it arrived with a hash of those bytes beside it.

  • Delivered by the source

    Webhooks from any vendor, with the signature scheme declared on the connection: an HMAC-SHA256 header, the Standard Webhooks specification or a shared bearer token. The raw body is kept and the verification outcome recorded.

How it will be collected

When this receiver ships, the vendor delivers to a per-connection URL, the signature is checked with the scheme the connection declares, the raw body is kept, and the outcome is recorded.

The evidence model

What every connector and receiver ships with, whatever the source:

  • A receipt per collection: what was asked for, what arrived, the cursor before and after
  • A declared gap for any interval nothing covers, never a blank
  • A daily settlement once late records can no longer arrive
  • The raw record, byte for byte, with its hash
  • An evidence bundle anyone can verify offline

What you get

  • Sealed as it arrives

    Every record is hashed and chained to the one before; every few minutes the chain is sealed into a signed checkpoint. A changed, deleted or reordered record fails verification at that exact point.

  • Continuity you can show

    The receipts chain too, so an auditor sees not only the records but that nothing between them went uncollected, and where a gap was, that it was declared.

  • Verified without us

    An export carries the open-source verifier. It runs offline, checks the chain, the receipts and the gaps, and needs no Sigilbase account. How the service is run.

Questions about Signed webhooks

  • Does Sigilbase support Signed webhooks?

    Receivers ship in waves, and this one is in the first. Until then, anything that can send JSON reaches Sigilbase through the events API today. Whatever arrives is written to a chained, signed ledger whose evidence anyone can verify offline with the open-source verifier, without a Sigilbase account.

  • What can be sent through Signed webhooks?

    Delivered by the source: Webhooks from any vendor, with the signature scheme declared on the connection: an HMAC-SHA256 header, the Standard Webhooks specification or a shared bearer token. The raw body is kept and the verification outcome recorded.

  • How will Signed webhooks evidence be collected and verified?

    When this receiver ships, the vendor delivers to a per-connection URL, the signature is checked with the scheme the connection declares, the raw body is kept, and the outcome is recorded. Every collection will be receipted in the connection's own stream: what was asked for, what arrived, and the cursor before and after. An interval nothing covers will be declared as a gap, never left blank. Exports carry the standalone verifier, which checks the chain, the receipts and the gaps offline.

Start recording provable history

Chained, sealed, independently verifiable audit logs, from the first event. Free while Sigilbase is in beta.

Start free

Questions first? Write to hello@sigilbase.io.

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Last updated July 2026.