I'm building a low-code workflow and need an e-signature API with webhooks

If you need an e-signature API with webhooks for a low-code workflow, here are solid options to consider:

Good choices

• DocuSign
  Best-known, very robust API, strong webhook/event support, good for enterprise workflows.

• Dropbox Sign (HelloSign)
  Easier API experience than some enterprise tools, supports webhooks, usually simpler to integrate.

• Adobe Acrobat Sign
  Strong enterprise features, API + webhooks, good if you already use Adobe.

• SignNow
  Practical API, webhook/event support, often used for automation-heavy workflows.

• PandaDoc
  Good if your workflow also needs document generation and templates, plus webhook support.

What to look for

• Webhook events like:
  • envelope/sig request sent
  • viewed
  • signed/completed
  • declined
  • expired
• Template support so you can reuse signing flows
• Embedded signing if users should sign inside your app
• API auth that’s easy for low-code tools to handle
• Sandbox/testing environment

For low-code platforms

If you’re using tools like Zapier, Make, n8n, Power Automate, Bubble, Retool, or Glide, these providers usually work well because they offer:

• REST APIs
• webhook callbacks
• prebuilt integrations in some cases

My quick recommendation

• Simplest developer experience: Dropbox Sign
• Most enterprise/feature-rich: DocuSign
• Best if you need document automation too: PandaDoc

If you want, I can also give you:

1. a comparison table,
2. the best option for your specific low-code tool, or
3. a sample webhook flow for one of these APIs.