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Echo Pro

Authentication, tenant quotas, audit and webhooks for Echo v5.

Add authentication, tenant checks, quotas, audit records, webhooks and an admin console to your Echo application. Install LabStack's commercial Go module with the standard Go toolchain.

See pricing Read the docs

Go 1.26 or later
Echo v5.4.2 or later
PostgreSQL 16 through 18
Redis or Valkey (optional) for quota/redisstore

authCfg := auth.Config{
  Schemes: map[string]auth.Scheme{"key": auth.APIKey{
    Namespace: "app",
    Prefix:    "demo",
    Peppers:   ring,
    Store:     keys,
    Header:    "X-API-Key",
  }},
  Fallback: auth.Require(map[string][]string{"key": {"invoice:read"}}),
}
tenantPath, err := tenant.FromPathParam("tenant")
if err != nil {
  return err
}
guard, err := authbind.Middleware(authCfg, tenant.Config{
  Selectors: []tenant.Selector{tenant.FromCredential(), tenantPath}, Required: true,
})
if err != nil {
  return err
}

lim, err := quota.New(quota.Config{
  Store: quota.NewMemoryStore(quota.MemoryConfig{MaxKeys: 100}),
  Plans: []quota.Plan{{ID: "free", Limits: []quota.Limit{
    quota.PerDay("requests", 3),
  }}},
})
if err != nil {
  return err
}
defer func() {
  closeCtx, cancel := context.WithTimeout(context.WithoutCancel(ctx), 5*time.Second)
  defer cancel()
  result = errors.Join(result, lim.Close(closeCtx))
}()
identity, err := authbind.Quota()
if err != nil {
  return err
}
quotaMW, err := (quota.MiddlewareConfig{
  Limiter:  lim,
  Identity: identity,
}).ToMiddleware()
if err != nil {
  return err
}

prepared, err := webhook.PrepareOutgoing(webhook.Outgoing{
  Tenant: string(
    id,
  ), Destination: "invoices", Version: "v1", Key: invoice + "/created",
  Type: "invoice.created", Format: "json", Payload: []byte(fmt.Sprintf(
    `{"invoice":%q}`,
    invoice,
  )),
})
if err != nil {
  return err
}
receipt, err := outbox.Enqueue(c.Request().Context(), prepared)
if err != nil {
  return err
}
return c.JSON(http.StatusAccepted, map[string]string{
  "invoice":     invoice,
  "webhook_ref": receipt.Ref,
})

No telemetry Telemetry exporters run only when you configure them.
No license checks at run time Your token only downloads modules.
Keep what you bought Versions you received stay licensed after you stop paying.
Plain go get Install through a private Go module proxy, checked against your go.sum.

Where it sits in a request

Mount middleware on your routes in the order shown. Your application supplies handlers, PostgreSQL pools and Redis clients.

Packages

One module, echo.labstack.com/pro. Runnable examples, tests and package READMEs ship with it.

Auth and tenant isolation

auth · tenant · auth/authbind

Verify an API key or JWT access token before selecting a tenant. Conflicting tenant selectors return 403. Check resource access with Static, Casbin, Cerbos or OpenFGA.

Quotas, AI and MCP metering, Stripe

quota · quota/quotamcp · quota/quotastripe

Return 429 when a tenant exhausts its plan. Reserve estimated AI usage and settle actual cost. Meter MCP tools and send final usage to Stripe.

Embedded admin console

admin

Inspect usage and stored operations behind your application login. Enable specific write actions with preview and confirmation. Record audit intent before running them.

Echo Pro packages
Package	What it does
`auth`	API keys and asymmetric JWT access tokens, one credential per request.
`tenant`	Tenant resolution with membership checks and deny-by-default authorizers.
`auth/authbind`	Maps verified principals and selected tenants into quota, audit, execution, admin and MCP callbacks.
`quota`	Per-tenant plans, weighted costs, credits, concurrency limits and Echo middleware.
`quota/redisstore`	Atomic Redis and Valkey store: standalone, Sentinel and Cluster.
`quota/quotamcp`	Plan quotas and metering for MCP tools on the official MCP Go SDK.
`quota/quotastripe`	Stripe meter export of final usage, with receipts and reconciliation.
`quota/quotaclient`	Client helpers that parse RateLimit headers and problem responses, and wait before retrying.
`quota/quotaprom, quota/quotaotel`	Opt-in Prometheus and OpenTelemetry hooks into your own systems.
`audit, audit/auditpg`	Durable business audit events with redaction, recorded in PostgreSQL 16 through 18.
`execution, execution/pgstore`	Records each external call under a stable key, so retries replay the saved result. Operators resolve uncertain calls.
`webhook, webhook/webhookpg`	Signed inbox and outbox, retry workers and replay, durable on PostgreSQL.
`openapi`	Checks that every OpenAPI operation has an auth and quota policy, and runs auth, quota and validation in order.
`problem`	RFC 9457 problem catalog and Echo error rendering.
`redact`	Classifies fields and removes or hashes sensitive values before storage.
`admin`	The embedded console, with panels for quota, Stripe, audit, execution, webhooks and OpenAPI.
`cmd/quota`	Command line for plan checks, usage, resets, credits, keys and the outbox.

Pricing

Billed annually per organisation.

Echo

Free MIT license

Free and open source

The Echo framework and built-in middleware
echo-jwt, echo-otel, echo-prometheus, echo-contrib
Community support on GitHub

Get started

Team

~~Was $1,500~~, now $990 / year

Code FOUNDING takes 34% off the first three annual invoices, for the first 25 organisations. Available until 31 Mar 2027.

Up to 20 developers

Everything in Echo
Every Echo Pro package
Every release while subscribed
Access tokens for go.labstack.io
Email support, two-business-day target

Buy Team

Business

~~Was $4,500~~, now $2,970 / year

Code FOUNDING takes 34% off the first three annual invoices, for the first 25 organisations. Available until 31 Mar 2027.

Up to 100 developers

Everything in Team

Buy Business

Secure checkout by Stripe; enter code FOUNDING for the founding price. Invoices, payment method and cancellation: billing portal.

Want to run it first? Request a free 14-day evaluation. Tell us what you are building, and we will send you a token for the full module.

Echo Support

$4,900 / year, invoiced annually. Maintainer help for Echo v4 or v5, with or without Echo Pro: a named contact, four incidents a year, a two-business-day response target and an annual maintenance-status letter. Best effort; no SLA. Terms.

Enterprise

From $12,000 / year · More than 100 developers, or group companies.

Compare plans
Feature	Echo	Team	Business
Packages
Echo framework and built-in middleware	✓Included	✓Included	✓Included
Official packages (echo-jwt, echo-otel, echo-prometheus, echo-contrib)	✓Included	✓Included	✓Included
Echo Pro packages	−Not included	✓Included	✓Included
Developers
Developers per organisation	Any	Up to 20	Up to 100
Updates
New releases	✓Included	While subscribed	While subscribed
Keep received versions after the subscription ends	✓Included	✓Included	✓Included
Security fixes for your release lines after the subscription ends	−Not included	✓Included	✓Included
Support
Community support on GitHub	✓Included	✓Included	✓Included
Email support, two-business-day target	−Not included	✓Included	✓Included
Echo Support ($4,900 / year)	Sold separately	Sold separately	Sold separately
Billing
Price	Free	$1,500 / year	$4,500 / year
Founding price with FOUNDING	−Not included	$990 / year	$2,970 / year
Billing	−Not included	Annual	Annual

Team and Business terms

Annual billing only; no monthly plan.
Email support is best effort: a two-business-day target, not an SLA.
Full refund within 30 days of purchase.
Prices exclude tax. Sold to businesses: checkout asks for your company name, and a tax ID where supported.
After your subscription ends, you keep received versions. You also receive security fixes on the release lines you owned.

Install

After purchase you create your organisation's access token once. Then, on each machine:

Mark the module private. If you already set GOPRIVATE, append ,echo.labstack.com to your existing value instead.
```
go env -w GOPRIVATE=echo.labstack.com
```
Add this line to ~/.netrc (Windows: %USERPROFILE%\_netrc), mode 600.
```
machine go.labstack.io login <org> password <token>
```

Add Echo Pro to your module.

go get echo.labstack.com/[email protected]

In CI

Store the token as a CI secret and write a job-scoped credential file before go runs. Installation has a complete GitHub Actions workflow, plus corporate mirrors, GOPROXY chains, Docker and offline builds.

Questions

What stays free?

Echo, its built-in middleware and the official packages (echo-jwt, echo-otel, echo-prometheus and echo-contrib) are open source under the MIT license. Echo Pro is a separate module that builds on them.

Is Echo going closed source?

No. Echo stays open source under the MIT license. Echo Pro is a separate module that builds on Echo and does not change its license.

Why paid?

Echo Pro includes authentication, tenant checks, quotas and durable stores. Backend tests run against PostgreSQL 16 through 18, Redis and Valkey. Subscriptions pay for that work and fund Echo's maintenance.

What license is Echo Pro under?

Echo Pro uses a commercial license. While subscribed, your organisation may use, copy and modify Echo Pro. You may include it in applications you distribute and services you operate. You may not pass its source to third parties. You may not offer it as a standalone library or competing product.

Does Echo Pro send telemetry or check a license at run time?

No. The library does not send telemetry or perform runtime license checks. Configure metrics and tracing through hooks into your own systems.

What happens when the subscription ends?

You keep the versions you already have. You also keep access to security fixes for the release lines you owned. New versions need an active subscription.

Can we evaluate before buying, or get a refund?

Yes, for 14 days, free. Email [email protected] with what you are building, and we will send you an access token for the full module. Use it to try Echo Pro, not in production. When the evaluation ends, the token stops working, and you must stop using Echo Pro and delete your copies unless you buy a plan. A purchase comes with its own token. After purchase, you get a full refund within 30 days if Echo Pro is not right for you.

What does Echo Support include?

A yearly contract with the maintainer for teams running Echo v4 or v5, with or without Echo Pro: a named contact, four incidents a year, a two-business-day response target on US business days and an annual letter listing your Echo versions, the advisories that apply and their support dates. It has no fixed repair time and no 24/7 cover. Security fixes stay public for everyone; Echo Support does not buy earlier or private fixes.

Invoices and purchase orders?

Team and Business are billed annually per organisation. Echo Support and Enterprise are invoiced annually. Email [email protected] for billing details your company needs.

For other questions, email [email protected].

Run the getting-started tutorial.

Start the tutorial Email us

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