Meter Kinds

Every sign operation increments one billing meter. Meters are recorded in the audit log and reported in GET /v1/usage. The billing.meter field in a recipe specifies which meter to use.

Meter reference

Meter	Description	Plans
`image_sign`	Sign one image (JPEG, PNG, WebP)	All
`audio_sign`	Sign one audio file (WAV, MP3, FLAC, OGG)	Developer+
`video_sign`	Sign one video file (MP4, WebM)	Developer+
`text_sign`	Sign one text generation event (SynthID-Text hook)	Developer+
`image_verify`	Verify one image (authenticated, counted)	All
`audio_verify`	Verify one audio file	Developer+
`video_verify`	Verify one video file	Developer+
`lookup`	One soft-binding lookup call	All
`byok_sign`	Sign using BYOK KMS key (additional meter on top of modality meter)	Enterprise BYOK
`anchor_batch`	One anchor batch submission (all batch members share one submission credit)	Growth+

Notes

image_verify, audio_verify, video_verify: public verify (POST /v1/verify without authentication) does not count toward metered usage. Only authenticated verify calls are metered.
byok_sign is charged in addition to the base image_sign/audio_sign/video_sign meter. Both meters increment for a BYOK sign call.
anchor_batch: a batch may contain hundreds of manifest digests. Each batch counts as one submission, regardless of how many manifests it contains.
Verify calls that return an error due to an internal failure (verbitas.internal_error) are not metered.
Lookup calls that return zero matches are still metered.

Plan quotas

Meter	Free	Developer	Growth	Enterprise
`image_sign`	50/mo	1,000/mo	20,000/mo	Custom
`audio_sign`	—	500/mo	10,000/mo	Custom
`video_sign`	—	200/mo	5,000/mo	Custom
`image_verify` (authenticated)	100/mo	5,000/mo	50,000/mo	Custom
`lookup`	100/mo	5,000/mo	50,000/mo	Custom

Exceeding a quota returns 402 verbitas.billing.quota_exceeded. On the Growth and Enterprise plans, usage above the included quota is charged per-unit at rates listed in your plan agreement.

Checking current usage

curl -H "Authorization: Bearer $VERBITAS_API_KEY" \
  https://api.verbitas.io/v1/usage | jq .

Response:

{
  "period_start": "2026-05-01T00:00:00Z",
  "period_end": "2026-06-01T00:00:00Z",
  "meters": {
    "image_sign": { "used": 423, "limit": 1000 },
    "image_verify": { "used": 101, "limit": 5000 },
    "lookup": { "used": 55, "limit": 5000 }
  }
}

Usage in the audit log

Every metered event is recorded in the audit log as asset.signed, asset.verified, or asset.lookup. The billing.meter field is included in the event data. Export the audit log to your billing system for cost allocation:

curl "https://api.verbitas.io/v1/audit?event_type=asset.signed&format=ndjson" \
  -H "Authorization: Bearer $VERBITAS_API_KEY"