Adobe Sign API

Developers search "adobe sign api" when they need programmatic envelope create, send, status, and download inside Adobe Document Cloud. This guide maps Adobe Sign REST concepts to Atlas equivalents for teams evaluating migration or dual-run.

Adobe Sign API overview

Adobe Acrobat Sign (often shortened to Adobe Sign) exposes REST APIs under Adobe's developer console. Typical flow:

1. OAuth or JWT service account authentication
2. POST agreement (transient document or library document)
3. Configure participant sets and signature fields
4. PUT or POST to move agreement to IN_PROCESS
5. Poll GET agreement status or register webhooks
6. GET combined document URL when signed

Adobe assumes admin provisioning in Adobe Admin Console. API access requires appropriate Sign licensing on the account.

Authentication model

Adobe Sign uses OAuth 2.0 with integration keys tied to an Adobe organization. Service accounts can use JWT credentials for server-to-server flows.

Atlas uses Bearer API keys from the dashboard. MCP clients use OAuth against /api/oauth for Claude and ChatGPT.

Migration tip: budget time to replace Adobe token refresh logic with Atlas key rotation policies in your secrets manager.

Create and send comparison

Adobe Sign (simplified transient document):

curl -X POST "https://api.na1.adobesign.com/api/rest/v6/transientDocuments" \
  -H "Authorization: Bearer $ADOBE_ACCESS_TOKEN" \
  -F "File=@contract.pdf"

Then POST agreement with transientDocumentId and participant sets.

Atlas create:

curl -X POST https://atlaswork.ai/api/envelope \
  -H "Authorization: Bearer $ATLAS_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "document_url": "https://example.com/contract.pdf",
    "parties": [{ "email": "signer@example.com", "name": "Signer", "role": "Customer" }]
  }'

Atlas returns review_url. After field confirmation, POST /api/envelope/{id}/send dispatches email.

Field placement

Adobe Sign agreements use form field definitions in API payloads or authoring in Acrobat. Atlas runs field detection on PDF or DOCX, then humans confirm in review.

Re-detect: POST /api/envelope/{id}/redetect when the underlying document changes.

Webhooks

Adobe Sign webhooks register per account with event filters. Atlas sends JSON lifecycle events with HMAC signature header using your API key.

Map common events:

• AGREEMENT_ACTION_COMPLETED → envelope.signed (when all parties done)
• AGREEMENT_RECALLED → envelope.voided
• AGREEMENT_REJECTED → envelope.declined

Templates and library documents

Adobe library documents power repeat sends. Atlas templates use POST /api/templates/{id}/send with optional auto_send when the workflow is trusted.

See API document template guide for Atlas template patterns.

Pricing and API tiers

Adobe Sign API access rides on Sign licensing, often bundled with Document Cloud seats. Read Adobe Sign API pricing for tier notes and Atlas usage comparison.

When to keep Adobe Sign API

• Company-wide Adobe ETLA already covers Sign seats
• Signers expect Acrobat-branded signing chrome
• IT mandates Adobe Admin Console as identity source of record

When to pilot Atlas

• Sends originate from agents, backends, or CI without Acrobat UI
• You want review-before-send defaults on ad-hoc documents
• You need MCP tools without wrapping Adobe OAuth yourself

Further reading

• Adobe Sign REST API endpoints
• Acrobat Sign API naming
• E-signature API guide
• Adobe Acrobat Sign alternative

Adobe Sign API FAQ

Does Atlas use Adobe's agreement object? No. Atlas uses envelope, parties, and fields. Map agreement IDs to envelope_id in your integration layer.

PDF and DOCX? Atlas accepts both on create. DOCX converts to PDF for signing and review.

Embedded signing? Atlas sign pages live at atlaswork.ai/sign with party tokens. Link from your portal for embedded-style flows.

Sandbox billing? Atlas drafts are free. Sends consume credits. Know your test economics before CI sends thousands of envelopes.

OAuth vs API key? Adobe Sign integrations typically use OAuth. Atlas REST uses API keys; MCP uses OAuth for agent clients.

OAuth token lifecycle

Adobe access tokens expire. Production integrations need refresh logic, secure storage, and alerting when refresh fails at 2am.

Store integration key, client secret, and refresh token in a secrets manager with rotation policy. Never log bearer tokens in application logs.

Atlas API keys rotate from the dashboard without OAuth dance. MCP OAuth tokens follow standard refresh for Claude and ChatGPT clients.

Agreement status enum mapping

Build a translation table early:

Atlas envelope status derives from parties array and voided_at. Poll GET /api/envelope/{id}/status for lightweight checks.

Multi-party sequential signing

Both platforms support ordered signing. Adobe participant sets define routing order. Atlas parties array order defines sequential flow.

Neither supports simultaneous signing on one envelope. Plan UX copy so signers know they may wait for prior parties.

Error monitoring

Log Adobe API error codes with agreementId context. Alert on repeated INVALID_ACCESS_TOKEN or quota errors.

Atlas returns structured JSON errors. Track 402 credits exhausted separately from 409 version conflicts on fields patch.

Compliance handoff

Security review will ask about data residency, retention, and signer authentication. Collect Adobe trust docs and Atlas security overview before production launch.

Legal may require sample signed PDF and certificate export from each vendor during pilot.

Dual-run migration week

Week one: read-only parity tests on status poll. Week two: create agreements in staging on both vendors with test signers. Week three: webhook handler parity. Week four: legal review of signed artifacts before production traffic switch.