Aspra Gateway

One API for every super-app service.

Mobile top-ups, bill payments, remittance, gift cards, eSIM, travel — 9 categories, 200+ countries, one integration.

HMAC-signed webhooks
Idempotent by design
Sandbox = production
zsh — api.aspra.io
$  
200+
Countries
800+
Operators
12,000+
Products
9
Categories
99.95%
Uptime

Nine categories. One contract.

Same auth, same idempotency model, same webhook envelope. Add a new product line with a single endpoint flip.

How it works

Three steps from signup to a delivered transaction. No SDK required, but we ship one for every major language.

  1. 01

    Sign up

    We review every application within one business day to keep the network clean.

  2. 02

    Top up your wallet

    Prepaid model: bank wire, card, or stablecoin. No monthly minimums under Starter.

  3. 03

    Call the API

    Quote → Confirm → Webhook. Idempotent at every step. Fully reversible in sandbox.

curl -X POST https://api.aspra.io/v1/public/recharge/confirm \
  -H "Authorization: Bearer pk_live_xxx.sk_live_xxx" \
  -H "Idempotency-Key: $(uuidgen)" \
  -d '{
    "quoteId": "qt_01HXY...",
    "msisdn": "+9715xxxxxxx"
  }'

POST /v1/public/recharge/confirmreturns a transaction in delivered, pending, or failed state. Webhook fires within 200ms of state change.

Why teams switch to kapi

Built by engineers who got tired of stitching together airtime APIs, gift card APIs, and bill payment APIs from five vendors.

One API, nine categories

Top-ups are just the start. Bills, remittance, wallets, gift cards, virtual cards, eSIM, travel and hotels — all on the same primitives.

Deterministic settlement

Double-entry ledger, per-transaction reconciliation, FX captured at quote time. No opaque batches, no surprise breaks.

Webhook-first

HMAC-SHA256 signed events with exponential retry. Replay any event for the last 30 days from the dashboard.

Sandbox parity

Sandbox mirrors production schemas, error codes, and latency profiles — so the bug you find there is the only bug you find.

Built for regulated environments

  • PCI DSS· in progress
  • ISO 27001· in progress
  • SOC 2 Type II· in progress
  • GDPR· ready
  • PSD2 SCA· ready

Simple, prepaid pricing

Pay-as-you-go from your wallet. No hidden minimums under Starter. Volume discounts kick in automatically.

Starter

Pay as you go

For prototypes and early integrations.

  • Sandbox + Live access
  • All 9 categories
  • Standard webhooks
  • Email support
Get API key
Most popular

Growth

Volume tiering

When you cross 100k transactions / month.

  • Volume discounts
  • Multi-region failover
  • Custom webhook routes
  • Slack + email support
Get API key

Enterprise

Custom

For super-apps, banks, and high-volume issuers.

  • Dedicated capacity
  • Custom SLAs (99.99%)
  • Private peering / VPC
  • Solutions engineer
Contact sales

Ship in a weekend, scale to a billion calls.

Get a sandbox key in minutes. Move to production once you've signed your MSA.