A direct line between your systems and ours
H2H connects your infrastructure directly to Modem Pay over secure HTTPS endpoints. No dashboards and no manual steps, just reliable, automated transactions for authorised partners.
How it works
- 1Apply for access
Contact us to be onboarded as an H2H partner. Access is granted per business.
- 2Get your credentials
Once approved, you receive an API key and signing secret, and we walk you through the endpoints.
- 3Integrate and go live
Connect your servers, test in the sandbox, and go live with monitoring from day one.
Everything you need, included
HTTPS and JSON
Standard web protocols and no custom formats. Send authenticated requests and get clean JSON back.
Partner-only access
Endpoints need explicit authorisation tied to your business account, and access can be revoked instantly.
Signed requests
Every request is authenticated with your API key and a digital signature, so only your system can talk to ours.
Scoped access
Access can be limited to specific flows: pay-in only, payout only, or a custom mix.
Monitoring and logging
All H2H activity is logged to detect unusual behaviour and keep you compliant.
Built for volume
Designed for large transaction volumes and fully automated workflows.
Built for
Works well with
Start using host to host today
Create an account in minutes and test with sandbox keys. Go live once your business is verified.