Notary API pricing and what each remote online notarization costs when your software creates it

A notary API has two price components: access to the API itself and the cost of each notarization it creates. Vendors usually sell the first by quote and the second per session, per signer or per seal, which makes a budget hard to build before you talk to sales. If you can state your monthly volume, the simplest comparison is cost per session at that volume, with the API, the notary and the audit trail all counted in.

These notes come from public pricing and help pages checked in October 2026. Where a vendor publishes nothing, the table says so rather than guessing.

The pattern matters more than any single figure. If a vendor's cheapest published rate is on a tier without API access, the real cost of a software-driven workflow is whatever the quote says.

A fair comparison counts more than the headline number.

• **Platform and API access.** Is it included, an add-on, or a separate contract?
• **Per session or per signer.** A two-signer closing package costs twice on a per-signer model.
• **Seals and documents.** Some vendors charge per seal, so a ten-document packet is not one price.
• **Identity checks.** Credential analysis and knowledge-based authentication are a line item at some vendors and included at others.
• **The notary.** Do you supply commissioned notaries, or does the vendor? That is the largest hidden cost on platform-only products.
• **Evidence.** The audit trail, session recording and journal entry should come back through the API, not only in a dashboard.
• **Webhooks.** Without signed events, your system has to poll for status.

A session covers up to 4 signers and up to 10 documents. Scale also includes 10 seats for your own commissioned notaries, so a staff notary can take sessions your system creates while the network handles the rest. The session count is the number you should compare with a per-signer model: a title packet with two signers is one session here.

Take 40 two-signer notarizations created by your system in a month.

The first row uses the published pay-as-you-go components and is only a rough guide, because a vendor can bill the second signer and the e-sign fee differently, and because that tier does not list API access. Ask every vendor to price your real signer and document counts in writing.

• Title and escrow production teams that want a notarization step inside their closing software.
• Lenders and servicers that need sealed agreements and an audit trail attached to the loan file automatically.
• Insurance claims platforms that send powers of attorney and sworn statements at volume.
• HR and onboarding systems that notarize documents for relocating staff.

Teams that only notarize a few documents a month rarely need an API. A plan in the web app is cheaper and simpler until volume justifies integration. If you are building the integration yourself and want a head start on the surrounding code, a tool like an API generator that builds endpoints from a schema can cover the plumbing on your side, while the notarization itself stays with a commissioned notary.

• What is the total monthly cost at our volume, with API access, identity checks and seals included?
• Is a two-signer session billed once or per signer?
• Who supplies the notaries, in which states, and at what hours?
• Which webhook events do you send and are they signed?
• Does the API return the sealed PDF, the audit trail and the recording?
• What is the minimum term, and what happens to unused sessions?

How much does a notary API cost?

It depends on the vendor, and many do not publish it. On ENotary the API comes with the Scale plan at 799 USD per month, or 399 USD per month billed yearly, with 40 sessions included, about 10 to 20 USD per session at full use. Other vendors quote API access after a sales call.

Does Proof have a public API price?

Proof publishes pay-as-you-go fees, such as 25 USD per notarization meeting, but lists API access in team plans that are priced by quote. Ask for a written quote that includes your expected monthly volume, signers and seals.

Is an online notary API cheaper than the web app?

Not per notarization. The API saves staff time because your system creates sessions and receives the sealed documents automatically, so the benefit shows up in labor and fewer retyped fields. If volume is low, the web app on a smaller plan costs less overall.

Can our own notaries use the API workflow?

Yes, on platforms that support own-notary seats. ENotary Scale includes 10 seats, and a session created through the API can be assigned to one of your notaries or to a network notary. The audit trail records which notary completed the act.

What does the API return after a session?

On ENotary it returns the status of each signer, the sealed PDF and a JSON audit trail, and signed webhooks announce each step. Check that any vendor you evaluate returns the evidence, not just a completion flag. Details are on the notary API page.

• Notary API and webhooks
• Online notary cost and plans
• Remote online notarization for loan modifications
• Bring your own notary
• Proof pricing and alternatives

Pick the plan that matches your monthly sessions and start sending notarizations from your own system.