Event-driven APIs

Win more deals by shipping reliable webhooks for your customers

Your customers want their agent workflows to be event-driven. If your API can't push events, you lose the deal to one that can. Svix gives you production-grade webhooks in days, not quarters.

By the creators of

Standard Webhooks

Svix has led the creation of the Standard Webhooks specification, establishing the first industry standard for secure and reliable webhook delivery used by modern developer platforms.

Adopted by top webhook senders, including:
OpenAI
Anthropic
Google
Supabase
Kong
ngrok
Why it matters

Customers ask for webhooks before they sign

Once customers build on your API, they want to know the moment something changes. Without webhooks they poll you thousands of times a day, or they pick a vendor that pushes.

~99.9% of polls: nothing changed
17,280requests a day
One agent polling one resource every 5 seconds, for a resource that changes about ten times a day.

Deeper engagement

Customers wire your events into their own systems, chat tools, and agents, so your product sits in the middle of their workflows instead of beside them.

Stronger retention

An integration built on your events is work a customer would have to redo to switch vendors. That makes your API harder to replace.

Ready for agents

Agents react to events instead of polling on a timer, so the workflows your customers build on top of you run faster and cost less.

Brex

“Our customers wanted us to send webhooks. We saw in our data, and we heard it directly from them.”

Milo SpirigAPI Product Lead, Brex
Tens of thousands of polls a dayNo incidents in years of production
Read the full story

Give your customers a prebuilt UI

Use our white-labeled portal, or build your own with our APIs. Deliver a self-serve webhook experience that drives adoption and eliminates common support requests.

Explore the App Portal
Under the hood

What your customers test before they trust your webhooks

Retries, ordering, and replay protection are harder than they look. Svix handles all of it, so your webhooks hold up in the evaluation and in production.

Retries that don't give up early

Failed deliveries retry with exponential backoff for more than a day, and endpoints that keep failing are disabled automatically instead of piling up.

Signatures and replay protection

Every message is signed to the Standard Webhooks spec with a timestamp, and we ship verification libraries for every major language.

Ordering when it matters

Regular endpoints deliver at full throughput. FIFO endpoints guarantee strict ordering for the customers who need it, with no code change on your side.

Replay and recovery

Customers resend a single message or recover everything that failed since an outage, straight from the management portal.

No noisy neighbors

One customer's slow or failing endpoint never delays delivery to anyone else.

Logs your support team can use

Every attempt, response, and status code is searchable, so “did you send it?” takes seconds to answer.

For the engineers

Homebrewed your webhooks and getting paged at 4 a.m.?

Webhooks look like an HTTP POST until real customers depend on them: endpoints that time out, retry storms, one customer's outage slowing everyone else, and logs support keeps asking for.

Svix runs that infrastructure, so your team ships product instead of maintaining delivery.

Send an event with one API callTypeScript
import { Svix } from "svix";

const svix = new Svix("AUTH_TOKEN");

// Signed, fanned out, and retried by Svix
await svix.message.create("customer_123", {
  eventType: "invoice.paid",
  payload: { id: "inv_1042", status: "paid" },
});
Security & Compliance

Pass the security review that comes with the deal.

Svix is SOC 2 Type II, HIPAA, PCI DSS, PIPEDA, GDPR, and CCPA compliant, and runs in multiple regions to meet data-residency requirements. The enterprise tier adds custom requirements, compliance reviews, and hands-on support.

Read about our security
SOC 2 Type II
HIPAA
PCI DSS
PIPEDA
GDPR
CCPA

Startups get $12,000 in free credits

Incorporated in the last three years and raised $7M or less? Get $1,000 a month in Svix credits for a year, plus hands-on onboarding from our team. Companies in the current YC batch get $50,000.

What is an event-driven API?

An event-driven API tells its consumers when something changes, usually with webhooks, instead of making them ask over and over. Customers react to events like invoice.paid or job.completed the moment they happen.

Why not let customers poll our API?

Polling is slow for them and expensive for you. Most requests return nothing new, and at scale they become a large share of your API traffic. Brex saw customers polling tens of thousands of times a day before it shipped webhooks.

How long does it take to ship webhooks with Svix?

Days, not quarters. Resend built its Svix integration in a little over a week, and Replicate went to production in two weeks.

Will Svix pass an enterprise security review?

Yes. Svix holds the certifications listed above, keeps data in the region you choose, and sends from static source IPs that your customers can allowlist.

Do you offer startup credits?

Yes. Startups incorporated in the last three years that have raised $7M or less get $12,000 in credits, $1,000 a month for a year. Companies in the current YC batch get $50,000.

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