Pricing
Pricing
Three families, in this order: Chirindo Witness for agent-log evidence, the market-state API, and referee services and programmes. Prices are in US dollars.
Agent logs your auditor can check without trusting you
A signed hash chain catches edits to an agent's log, but not the last records being cut off, or a history rewritten by whoever holds the signing key. Witness keeps signed checkpoints of your log outside your control, so both show up when the log is checked against Witness, for everything up to the last checkpoint it signed. Verification is free and open source: anyone can run the check themselves.
See the test kit: five tampering cases and an untouched control, chain alone vs witnessed · Read the Witness spec
Free: anonymous checkpoints from a shared pool, currently 2,000 new checkpoints per UTC day. Paid plans get their own key and quota.
Subscription · Witness account
Evidence Starter
$49
/month · Introductory until 31 December 2026
Your own Witness key, shown on screen after payment. Up to 1,000 new checkpoints per UTC day, drawn from your own quota, not the free pool. For one production agent or a pilot.
Subscription · Witness account
Evidence
$199
/month · Introductory until 31 December 2026
Your own Witness key, shown on screen after payment. Up to 3,000 new checkpoints per UTC day, drawn from your own quota, not the free pool. For teams preparing evidence for AIUC-1 E015.4 log integrity across several agents.
Evidence pilot for a team in its audit window: $4,900 fixed price, scope agreed by conversation. Write to mike@headlessoracle.com.
Evidence that may support AIUC-1 E015.4. It does not make anyone compliant or certified; the honest limits are in the spec.
Market-state API
Explore
Sandbox
$0
200 calls over 7 days
Demo endpoint, no key needed
- /v5/demo endpoint
- All 28 exchanges
- Ed25519 signed receipts
- No auth required
Free
Free Tier
$0
/month
Get started instantly, no credit card needed
- 500 API calls/day
- All 28 exchanges
- Ed25519 signed receipts
- Instant provisioning
x402 · Live
Pay-per-use
$0.001
/request
0.001 USDC on Base mainnet — no subscription required
- No API key required
- All 28 exchanges
- Ed25519 signed receipts
- HTTP 402 machine-readable
One-time
Credits
$5
one-time
1,000 API calls, no expiry
- 1,000 API calls
- All 28 exchanges
- No expiry date
- Pay via card
Subscription
Builder
$99
/month
- 50,000 API calls/day
- All 28 exchanges
- Webhook subscriptions
- Receipt audit log
Subscription
Pro
$299
/month
- 200,000 API calls/day
- All 28 exchanges
- 25 webhook subscriptions
- Priority support
Protocol / Enterprise
Unlimited calls, custom SLA, dedicated support, direct engineering access.
Starting at $500/month. Best for DeFi protocols, RWA platforms, institutional trading.
Get your API key instantly
Click the button below. No email, no signup, no credit card. Your key appears in seconds.
Quick test:
Prefer the raw curl? curl -X POST https://headlessoracle.com/v5/keys/instant -H "Content-Type: application/json" -d '{"agent_id":"my-trading-bot"}'
All plans include
- Ed25519 cryptographic signatures on every response
- Fail-closed architecture
- 28 global exchanges across 7 regions (Americas, Europe, Middle East, Africa, Asia, Pacific, Derivatives & Crypto)
All tiers are live. x402 micropayments available now.
Try the API now — no signup needed.
Conformance and disputes
Paid referee work against the published methodology: a graded conformance run, a re-grade after you change your implementation, and a dispute package.
Introductory pricing — held until 31 December 2026.
The neutrality rule
A paid entry buys the run and the published record, never the verdict. Every entry carries an Interests section: the referee is the author of a competing format; independence is not claimed; recomputability from pinned bytes is claimed; the text and the implementation are scored separately; a finding stands until its author corrects the record, and the correction is published beside it. Verification of any receipt is free, always.
One-time
Conformance entry
$2,500
one-time · Introductory until 31 December 2026
One implementation graded against the published methodology. The run and the record are published.
One-time
Re-grade
$750
one-time · Introductory until 31 December 2026
A fresh run of an entry already on the register, after its implementation changed. The correction is published beside the original.
One-time
Dispute package
$500
one-time · Introductory until 31 December 2026
The pinned bytes, the recomputation steps and the finding, packaged so a third party can reproduce the result themselves.
One-time
Dispute package with verification note
$1,500
one-time · Introductory until 31 December 2026
The dispute package, plus a written note recording what was recomputed, what it establishes and what it does not.
Annual programmes
Two annual programmes exist, at $60,000 a year and $150,000 a year. Neither is bought from this page: both are by invoice after a conversation. Start with the intake form below and say which programme you are asking about.
Go to the intake form →Conformance intake
Submit an implementation for a conformance run. You receive an intake id; the entry is not scheduled until the entry fee is paid.
Posts to POST https://headlessoracle.com/v5/referee/intake