Encypher Mark
Mark content once. Keep its history attached.
Add verifiable provenance to AI outputs, original work, licensed IP, and governed enterprise content. One Mark contract covers 40+ formats: text, images, audio, video, PDF, and Microsoft Office documents including DOCX, XLSX, and PPTX.
40+
formats on one Mark contract. DOCX, XLSX, and PPTX join text, images, audio, video, and PDF
August 2, 2026
Article 50 applies to new systems; December 2, 2026 for systems already on the market
1,000
declared AI-output items a month on the free plan, plus 5 Article 50 compliance certificates
Mark in action
One answer, signed sentence by sentence
A real question in the public chat: every completed sentence passes through the live signing session before it appears, and the returned C2PA manifest opens beside the answer with its document, manifest, and provenance identifiers.
Start freeHow it works
From content to portable proof in three steps
No second product for a larger customer. The same Mark contract scales by volume, controls, and deployment needs.
- 1
Submit the completed content
Send a completed AI output, original work, or governed content object to Mark. Text, images, audio, video, PDF, DOCX, XLSX, and PPTX use the same API surface.
- 2
Receive signed content
Mark binds a signer identity and C2PA provenance to the submitted content. Rights terms can be attached only through the verified-domain workflow.
- 3
Verify and retain the evidence
Use public verification for the content itself, then retain the document ID, signing result, and any failed submission so coverage can be measured rather than assumed.
Outcome record
See what happened to every completed output.
Mark retains the result of each submission so success, failure, and coverage gaps stay visible after delivery.
Illustrative output record
Completed-output lifecycle
An output enters the record after completion. Marking and verification outcomes stay attached to the same evidence trail.
- 1
Completed output
Final content is ready
A completed text, media, PDF, or Office file reaches the application boundary.
- 2
Mark submission
Content enters Mark
The completed output and supplied metadata are submitted. A failed result remains visible rather than being counted as marked.
- 3
Public verification
Evidence can be checked
A recipient can verify the signed output without an Encypher account and see whether its document-level manifest validates.
- 4
Retained evidence
The outcome stays reviewable
The record keeps the submission, marking, verification, and bounded coverage state together.
Retained output record
Evidence for one completed submission
- Document ID
- MRK-DEMO-DOCX
- Format
- DOCX / C2PA 2.4
- Submitted time
- 2026-07-18 14:32 UTC
- Marking result
- Succeeded, signed output returned
- Public verification
- Verified, manifest valid
- Failure / coverage state
- This output is covered. Failed submissions stay explicit; bypassed outputs are outside the record.
Format note: DOCX, XLSX, and PPTX sign under C2PA 2.4 and verify version-agnostically. They are supported formats, not formal C2PA Conformance Program formats.
What Mark does
One Mark contract for every content path
The universal job stays fixed: bind portable provenance to content, make it verifiable, and keep the result for review.
Media and Office files, one API
One Mark contract covers 40+ formats. DOCX, XLSX, and PPTX sign under C2PA 2.4 and verify version-agnostically through the same Mark API used for text, images, audio, video, and PDF. They are supported formats, not formal C2PA Conformance Program formats.
Article 50 output marking
Support provider-side machine-readable output marking and detectability workflows. Article 50 applies August 2, 2026 for new systems, December 2, 2026 for systems already on the market; other duties and exceptions remain separate.
Verified identity and terms
Mark can bind a verified publisher identity and rights terms to content. It does not prove that the signer legally owns the copyright.
Evidence you can export
Retain signed output records, verification results, and explicit coverage gaps for customer, partner, audit, or regulatory review.
Plans
One Mark product, from Starter to Enterprise
Every plan runs the same Mark contract over the same formats. Starter fits an agency or one team. Each paid plan buys a monthly allowance of declared AI-output items; original human publishing remains free under fair-use guardrails. Enterprise carries the same API into large application portfolios with volume, organization identity, deployment, and governance controls.
Starter
or $990/yr billed annually
For agencies and small or mid-size teams: 10,000 declared AI-output items per month, unlimited Article 50 compliance certificates, and a one-click report.
Subscribe to StarterStandard
Popularor $15,000/yr billed annually
For growing content operations: 100,000 declared AI-output items per month with C2PA signing, organization identity, cryptographic timestamps, and AI disclosure.
Subscribe to StandardGrowth
or $40,000/yr billed annually
For high-volume content operations: 500,000 declared AI-output items per month on the same Mark API, trust chain, and verification path.
Subscribe to GrowthEnterprise
Unlimited declared AI-output signing on the same Mark API, with SSO, role-based access control, a 99.9% uptime SLA, and every add-on included at no extra charge.
Talk to us about EnterpriseEvery paid Mark plan includes a dedicated organization signing certificate chained to the Encypher CA and RFC 3161 cryptographic timestamps from the Encypher TSA. Our CA and TSA are on the official C2PA Trust Lists. See enterprise options.
What changes between plans
Format coverage, the trust chain, and public verification are the same on every row of this table. Volume, identity, and support are what a plan buys.
| Feature | Free | Starter | Standard | Growth | Enterprise |
|---|---|---|---|---|---|
| Formats on one Mark contract: text, images, audio, video, PDF, DOCX, XLSX, PPTX | 40+ | 40+ | 40+ | 40+ | 40+ |
| Signing original human publishing | Unlimited | Unlimited | Unlimited | Unlimited | Unlimited |
| Public verification, no account required | |||||
| Declared AI-output items per month | 1,000 | 10,000 | 100,000 | 500,000 | Unlimited |
| EU AI Act Article 50 compliance certificates per month | 5 | Unlimited | Unlimited | Unlimited | Unlimited |
| Dedicated organization signing certificate | |||||
| RFC 3161 cryptographic timestamps | |||||
| CAWG identity certificate | Included, pending approval | Included, pending approval | Included, pending approval | Included, pending approval | |
| White-label identity, Encypher root CA key issuance | Paid add-on | Paid add-on | Paid add-on | Paid add-on | |
| High-volume batch signing, 100+ documents per request | |||||
| Full audit trail for compliance | |||||
| Priority support | Paid add-on | Paid add-on | Paid add-on | Paid add-on | |
| SSO (SAML, OAuth) and role-based access control | |||||
| Dedicated SLA: 99.9% uptime, 15-minute incident response | |||||
| Self-serve checkout, no sales call |
One Mark contract covers 40+ formats, 44 media types today, on every plan. DOCX, XLSX, and PPTX sign under C2PA 2.4 and verify version-agnostically. They are supported formats, not formal C2PA Conformance Program formats.
Signing original human publishing is unlimited under fair-use guardrails. The monthly allowance applies to declared AI-output items.
Every paid plan includes a free CAWG identity certificate, pending enrollment and program approval. It can assert organization identity, personal identity, and multiple editor or tenant identities within one manifest, and it adds to, rather than replaces, the C2PA claim signer.
White-label identity with a private signing key issued from the Encypher root Certificate Authority is a paid add-on for organizations that want tool identity alongside organization identity. Encypher issues these identity certificates rather than accepting customer keys, because signing certificates reach the C2PA Trust Lists only through the conformance program.
The free plan is the entry path, not a trial. Start free with 1,000 declared AI-output items and 5 Article 50 compliance certificates a month.
Built on the standard
Organization identity and signing time, without verifier setup
Encypher passed the C2PA Conformance Program as both a generator and a validator product (assurance Level 1), and our Certificate Authority and Time Stamp Authority are on the official C2PA Trust Lists. Content signed with Encypher validates as trusted in any conformant C2PA reader, with no extra configuration on the verifier side.
Open C2PA evidence
Every successful Mark operation generates a C2PA manifest. Standards-based verifiers can validate the document-level signature; Encypher verification also resolves its sub-document text markers.
Paid-plan identity included
Every paid Mark plan includes a dedicated organization signing certificate chained to the Encypher CA and RFC 3161 cryptographic timestamps from the Encypher TSA. Our CA and TSA are on the official C2PA Trust Lists.
Where this fits
AI providers · Agencies and content teams · Publishers and IP holders · Enterprise application portfolios · Public sector
For engineers
curl -X POST https://api.encypher.com/api/v1/sign \
-H "Authorization: Bearer $ENCYPHER_API_KEY" \
-H "Content-Type: application/json" \
-d '{"text": "Your AI-generated output here.", "metadata": {"model": "gpt-4o"}}'- Two API calls today: sign outputs and analytics. Ingestion-side provenance scanning: in design partnership, talk to us.
- 40+ formats on one contract, 44 media types today: text, images, audio, video, PDF, DOCX, XLSX, and PPTX
- C2PA 2.x manifests with hard binding plus text soft binding
- DOCX, XLSX, and PPTX sign under C2PA 2.4 and verify version-agnostically; they are supported formats, not formal C2PA Conformance Program formats
- 1,000 AI-output assets per month free
- 5 compliance certificates per month free