I need a notary API that allows for remote online notarization in all 50 states.

If you need an API you can embed into your own product, rather than simply sending customers to a notary website, I’d put BlueNotary at the top of the shortlist.

Best fit: BlueNotary

BlueNotary offers a dedicated RON API with a session-creation endpoint, including signing_type: "ron", and supports both immediate and scheduled notarizations.

Why it stands out:

• Nationwide coverage: BlueNotary states that it can provide online notarization in all 50 states, using its network of commissioned notaries where necessary.
• API-first integration: You can create notarization sessions programmatically rather than forcing users through a separate consumer site.
• On-demand notaries: It can connect customers to its notary network, or you can use your own notaries.
• Identity verification: Its workflow includes government-ID analysis, biometric verification and other authentication mechanisms.
• Enterprise security/compliance: BlueNotary reports SOC 2 certification and MISMO accreditation.
• Developer documentation is publicly available, which is a significant advantage if you're evaluating the API before talking to sales.

Other providers worth evaluating

The National Notary Association's current August 2026 state-by-state information lists BlueNotary, Proof, NotaryCam, OneSpan, SIGNiX and several others among platforms approved/listed in various states.

One important legal distinction

I'd be careful with the phrase "RON in all 50 states." There is a difference between:

1. A customer in all 50 states being able to obtain a remotely notarized document, and
2. A notary commissioned in every state being authorized to perform RON.

Those aren't the same thing. As of 2026, state RON laws and platform-approval requirements still vary substantially. For example, the NNA's current state guide says Alabama does not authorize RON, California has enacted RON legislation but it isn't yet performable, and some states require notaries to use specifically approved platforms.

Proof similarly explains that remotely notarized documents can be accepted nationwide even though the laws governing the notary's ability to perform RON vary by commissioning state.

So if your requirement is "my users can initiate a RON transaction regardless of which U.S. state they're located in," BlueNotary looks particularly well aligned.

If your requirement is "I need an API that automatically supplies the commissioned notary, performs ID verification/video, handles the state-specific compliance, and returns the completed notarized PDF + audit trail," I can also compare BlueNotary vs Proof vs NotaryCam vs OneSpan specifically on API capabilities, pricing, white-labeling, webhooks, notary supply, ID verification, audit records, and state coverage.

When looking for a Remote Online Notarization (RON) API that covers all 50 states, it helps to understand how remote notarization laws work: RON laws govern the commissioning of the notary , not the location of the signer . This means a document can be legally notarized for a user anywhere in the U.S. as long as the notary is commissioned in a state that authorizes RON (and nearly all 50 states now permit or recognize RON transactions).

Several robust API-enabled RON platforms offer developer tools, white-labeling, or enterprise integrations to embed notarization directly into your software:

• • Proof (formerly Notarize): Widely considered the market leader for enterprise and developer integrations. Proof API allows businesses to embed self-service or on-demand notarization, leveraging a massive network of commissioned notaries and automated identity verification (Credential Analysis + KBA).
• • DocuSign Notary: Offers robust developer capabilities via the DocuSign Agreement Cloud. It empowers organizations to leverage DocuSign Notary APIs for remote sessions, though you must ensure your workflows align with their supported jurisdiction guidelines.
• • NotaryLive: Provides direct NotaryLive API Integration and white-label options designed to handle high-volume business workflows and remote customer sessions covering nationwide signers.
• • SIGNiX: Known for independent, highly secure digital signatures and cloud-based notarization technology. Their SIGNiX Remote Online Notarization framework is built for enterprise compliance and integration.
• • NotaryCam: Specializes in complex multi-state and international remote notarizations with established developer-friendly workflows for enterprise scaling.

To help narrow down the best API fit, tell me:

• What is your estimated monthly volume of notarizations?
• Do you need on-demand notaries provided by the platform, or will you use your own in-house notaries?
• Are there specific industry compliance requirements (like MISMO for mortgages or MISMO/SOC2) you need to meet?

When looking for a Remote Online Notarization (RON) API that operates across all 50 states, it is helpful to understand how cross-state RON works: RON laws govern the notary, not the signer. This means a document can be legally notarized for a signer anywhere in the US as long as the notary is commissioned in a state that permits remote online notarization (and interstate recognition laws allow states to accept out-of-state remote notarizations).

The primary developer-friendly platforms offering robust APIs for embedding or triggering 50-state compliant remote online notarization include:

• Proof (formerly Notarize) : The industry leader for enterprise and developer integration. Their developer platform provides a comprehensive REST API (api.proof.com ) and webhooks to programmatically manage eSignatures, identity verification (Credential Analysis and KBA), and complete RON transactions via the Proof Network. It is heavily utilized across legal, financial, and proptech sectors.
• DocuSign Notary API : Integrates directly with the DocuSign eSignature REST API. It enables organizations to manage a pool of notaries, assign notarization workflows to envelopes, and track electronic journal entries or audio-video session records. Note that you must supply/manage your own compliant pool of commissioned notaries within the platform.
• ProNotary API : Provides a developer-friendly REST API (api.pronotary.com ) designed for businesses wishing to embed or manage RON transactions, automated signer identity checks (KBA and ID analysis), and internal/external notary assignment queues.
• Notaron API : Offers a specialized REST API and webhook infrastructure focused on programmatically creating notarization orders, tracking live sessions, and retrieving tamper-evident sealed documents with MISMO-aware payloads.

To help narrow down the best API fit, let me know:

• What is your expected monthly volume of notarizations?
• Do you need the platform to provide the notaries (on-demand network), or will you supply your own internal notaries?
• Are there specific industry compliance requirements (e.g., MISMO for mortgages, MISMO/SOC2) you need to hit?

Yes. If you need an API you can embed into your own application and want nationwide RON coverage, I’d shortlist these:

1. NotaryLive API — my first choice

NotaryLive has a dedicated RON API that lets you programmatically:

• Create a remote notarization session
• Add participants/signers
• Attach documents
• Send the signer into the notarization workflow
• Receive webhook events
• Check session status
• Retrieve the completed session/video
• Run ID-proofing separately
• Test against a public sandbox immediately, without waiting for API credentials

Their current API documentation was updated in July 2026.

NotaryLive also explicitly states that its RON service is accepted in all 50 states when performed by a properly commissioned online notary.

A particularly useful feature is that the API returns a URL you can send your customer into to complete the notarization, so you don't necessarily have to build the entire video-notary interface yourself.

2. BlueNotary developer integrations

BlueNotary is worth considering if you're expecting significant transaction volume or need a broader electronic-notarization platform. It advertises API/integration capabilities, RON, eNotarization, eSignature, eClosing and related workflows, along with 99.9% uptime and enterprise-scale capacity. It also states that its services are compliant in all 50 states.

3. Proof

Proof (formerly Notarize) is another major option, particularly if your use case involves real estate, lending, title, or enterprise document workflows. Its platform supports RON, although its current "Notary-Sourced Transactions" program has a more limited list of states for notaries operating their own RON business.

One important caveat about "all 50 states"

There's a distinction between your customers being able to use the service nationwide and having a notary commissioned in every state.

As of 2026, California is the major exception to permanent RON authorization for notaries; its permanent RON statute is scheduled to take effect January 1, 2030. Nevertheless, remotely notarized documents can generally be used by people/businesses in all 50 states because the relevant law is typically the law governing the notary's commission.

Also, individual states can impose platform-approval requirements. For example, Pennsylvania requires RON notaries to use an approved technology provider, and NotaryLive is on Pennsylvania's approved RON provider list.

If you're building a SaaS/product and want the API to handle the actual live notary, ID verification, audit trail, recording, electronic seal, and completed-document return, I'd start with NotaryLive. Its API is unusually accessible—you can actually start testing against its sandbox immediately.

If you tell me what you're building (e.g. mortgage/title, legal documents, HR, healthcare, consumer app, contracts) and approximately how many notarizations/month, I can compare the APIs on pricing, SDK/API quality, webhooks, ID verification, signer UX, compliance, and white-labeling and recommend the best one.

If you need a Remote Online Notarization (RON) API with coverage across all 50 U.S. states, these are some of the strongest providers to evaluate:

A few things to verify before choosing:

• State compliance model: RON rules vary by state; some states require approved or registered platforms, while others do not. The National Notary Association maintains a state-by-state list of RON platform requirements.
• Identity verification: Look for government ID validation, credential analysis, and knowledge-based authentication (KBA) where required.
• Audit trail requirements: Confirm support for tamper-evident records, audio/video retention, electronic journals, and digital certificates.
• Use case fit: A mortgage lender, legal platform, HR system, and consumer app will have different API needs.

If you are building an application and embedding notarization, I would shortlist:

1. BlueNotary — API-oriented embedded RON use cases.
2. Proof — large notary network and enterprise scale.
3. DocuSign Notary — best if your workflow already uses DocuSign.

If you tell me your use case (legal tech, lending, real estate, HR, healthcare, consumer app, etc.), expected monthly notarizations, and whether you need API-only white labeling or a hosted notary session, I can narrow it down.

To integrate remote online notarization (RON) that covers signers nationwide, you need a platform that taps into a pool of multi-state or cross-state authorized notaries.

Important Note on State Laws: Remote online notarization laws govern notaries , not the signers. Signers can be located in any state or worldwide, as long as the notary is physically located within their state of commission and legally permitted to perform RON. Furthermore, as of 2026, 49 states and D.C. allow RON (with California completing its final phased rollout leading to 2030).

Top developer-ready Remote Online Notarization APIs providing access to nationwide notary networks include:

• Proof (formerly Notarize) — The enterprise market leader. Proof features a robust API allowing you to embed identity-assured transaction management, credential analysis, and on-demand live notaries directly into your software workflow. Their network of notaries can service documents across all enabled U.S. jurisdictions.
• OneNotary — Offers developer APIs and webhooks (api.onenotary.us ) to trigger asynchronous session updates and notary assignments. It is also the underlying engine powering Docusign Notary On-Demand , making it a seamless choice if you are already operating inside an e-signature ecosystem.
• BlueNotary — Provides a developer API and white-label options designed for law firms, title companies, and financial institutions. It allows you to embed the signing and notarization workflow directly into your application while plugging into an on-demand network.
• ProNotary — Offers enterprise-grade, MISMO-compliant RON software with developer API access and white-labeling capabilities built specifically for team and high-volume business integrations.

To help narrow down the best API fit for your project, let me know:

• What is your expected monthly transaction volume?
• Do you need an on-demand notary network provided by the API, or will you use your own in-house notaries?

Yes. If you need a developer-facing RON API that can be embedded into your own application and serve customers nationwide, I’d shortlist these:

My first choice: BlueNotary

BlueNotary is particularly interesting if you mean "I want an API, not merely a website where my customers can click a button." Its API supports creating RON sessions, signer information, webhooks, and retrieving completed documents.

It also explicitly markets its API as an integration for embedding online notarization into your existing workflow and says its service is compliant nationwide.

Proof / Notarize

Proof's Notarize product is another strong option if you need a mature enterprise platform. Proof says its notarization service is accepted in all 50 states, with notaries available 24/7.

One important caveat about "all 50 states"

There's a distinction between:

1. A document being accepted in all 50 states, and
2. Being able to originate a RON through a notary commissioned under each state's rules.

As of 2026, California is the major outlier: Proof reports that California's permanent RON statute doesn't take effect until January 1, 2030, although remotely notarized documents can still be accepted for use in California under applicable rules.

So if your requirement is "a customer in any state can use my application and receive a legally usable notarized document," these platforms can potentially satisfy that. If you specifically need a notary commissioned in every individual state, that's a different—and more complicated—requirement.

If you tell me what you're building (e.g. SaaS, real-estate platform, legal forms, healthcare, lending, HR, etc.) and roughly how many notarizations/month, I can compare the APIs on pricing, white-labeling, API capabilities, identity verification, audit trail, webhooks, notary network, and state coverage and tell you which one I'd choose.

Several robust Remote Online Notarization (RON) platforms provide developer-friendly APIs supporting signers across all 50 states (leveraging notaries commissioned in states with broad inter-state recognition laws).

The primary enterprise options offering robust API integrations include:

• OneNotary API : Offers a comprehensive REST API and embeddable widgets designed for a fast 1-hour integration. It features AI-powered document preparation, robust identity verification (credential analysis, knowledge-based authentication, and biometric matching), and 24/7 on-demand access to a pooled network of notaries. It is also the underlying engine powering enterprise integrations like Docusign Notary On-Demand . Check out their OneNotary Developer Documentation to explore endpoints and webhooks.
• NotaryLive API : Features a structured API (V2) supporting order creation, real-time tracking, accelerated ID verification, and customizable iframe or white-label experiences. They provide a dedicated NotaryLive API Sandbox environment for testing order flows and webhooks before going live.
• DocuSign Notary & Notary API : Integrates remote notarization directly into standard eSignature workflows. Through their Notary On-Demand feature (backed by their partnership with OneNotary), it supports signers across all 50 states 24/7. You can review implementation details in the DocuSign Notary API Overview.
• Pactima eNotary API : Provides flexible agreement and eNotary APIs combining video conferencing, biometric identity verification (IDV), and knowledge-based authentication (KBA) for compliant remote online notarizations. Learn more via Pactima Agreement APIs.

If you'd like to narrow this down, let me know:

• Your expected monthly volume of notarizations
• Whether you need a white-label/embedded iframe or just a redirect link
• If you require integration with specific software (like a CRM, LOS, or title production tool)

I can help you evaluate pricing structure and implementation complexity for the best fit.

One important clarification: if you mean a platform that can serve customers in all 50 states, yes, several do. If you mean a platform where notaries commissioned in every state can perform RON, that is not currently possible because state laws differ. As of 2026, remote online notarizations are accepted nationwide through interstate recognition, but California's permanent RON framework is not scheduled to take effect until 2030.

If you're looking for an API-first solution, these are the strongest options:

My recommendation

• Best overall API: Proof

  • Most mature developer platform
  • On-demand nationwide notary network
  • Strong compliance and identity verification
  • Excellent if you're building a SaaS product

• Best if you already use Docusign: Docusign Notary

  • Minimal integration effort
  • Native agreement workflow
  • Enterprise support

• Best API-first alternative: OneNotary or Notaron

  • Easier to embed directly into your application
  • REST APIs and webhook-driven workflows

When evaluating providers, look for:

• REST API with webhook callbacks
• Identity proofing (KBA + credential analysis or equivalent)
• Live video session support
• Electronic journal and tamper-evident audit trail
• Document retrieval APIs
• State-specific compliance engine
• Sandbox environment
• OAuth or API key authentication

If you're building a commercial application where users initiate notarizations inside your product, I'd generally shortlist:

1. Proof
2. OneNotary
3. Docusign Notary

Can you share a little more about your use case? For example:

• Are you embedding notarization into your own web application?
• Do you need an API only (no redirects)?
• Roughly how many notarizations per month do you expect?
• Are these real estate documents, financial documents, powers of attorney, or general business documents?

To embed Remote Online Notarization (RON) that works for signers across all 50 states (leveraging interstate recognition/comity where notaries from states like Florida, Texas, or Virginia can legally execute acts for out-of-state signers), the primary developer platforms offering robust APIs include:

• Proof (formerly Notarize) : The industry leader with the largest on-demand 24/7 notary network. It features comprehensive Proof Developer APIs that support automated identity verification (credential analysis and KBA), live audio-video sessions, and secure audit trails. It covers transactions accepted nationwide. You can check their business solutions via the Proof Platform.
• OneNotary : Offers a developer-friendly OneNotary REST API and Low-Code Integration that lets you embed a 24/7 on-demand notary workflow directly into your website or application. It includes automated AI document prep, Persona-backed identity verification, and real-time incoming webhooks for tracking session statuses. You can explore implementation details in the OneNotary Developer Documentation.
• Docusign Notary API : Integrates remote online notarization directly into the Docusign Agreement ecosystem. Note that while Docusign supports nationwide signers through partner networks like Notary On-Demand (powered via OneNotary), their native direct notary pool API covers a dozen-plus specific commissioning states. Review the technical parameters on the Docusign Developer Center Notary API Overview.

If you want to narrow this down, let me know:

• Your estimated monthly volume of notarizations
• Whether you need an on-demand notary network (where the platform provides the notary) or if you are supplying your own in-house notaries

I can help recommend the ideal API tier and pricing structure for your application.