XNS Relayer · the endpoint that runs on your side

Your endpoint. Your keys.
Your side of the line

The Relayer is a small S3 gateway that runs on your host. It encrypts every object before it leaves, splits it 80+40 across independent operators you picked yourself, and keeps every bucket name, key and access record in a database only you can reach. Everything else on this page is a consequence of that one decision.

$6.00/TB-mo $0.006/GB · 30-day minimum retention
$0 egress Uncapped
11 nines Durability — computed, not rounded up

Parity included in the rate, not charged on top.

Install in minutes ↓ See pricing math

Dial in durability, availability, distance, and compliance

The Weighted Builder exposes four dimensions: Durability (Standard → Proven → Veteran), Availability (Standard → Reliable → Always-On), Distance (location-relative filtering), and Compliance (country selector). Sliders generate a CEL expression; the "All Providers" count updates live as the filter narrows. Hit Apply to Relayer and HostIO immediately re-contracts to match.

Durability Availability Distance Compliance CEL editor
XNS Relayer VPD Weighted Builder — full size

The storage engine

HostIO: what happens to your data after the PUT

The Relayer is a full storage stack running on your hardware — not a thin gateway into someone else’s cloud. HostIO manages 120 independent host contracts, the erasure-coding fan-out, shard maps in a local PostgreSQL database, and active repair. Your S3 client sees a single endpoint; HostIO handles everything beneath it.

01

Point any S3 client — change nothing else

aws-cli, boto3, rclone, restic, s3fs — any S3 tool works unchanged. Change one endpoint. The Relayer speaks standard S3: object CRUD, multipart, presigned URLs, ListObjectsV2, CopyObject.

02

Gateway encrypts with XChaCha20 before anything else

Encryption happens at the Relayer gateway, before erasure coding. No host ever sees plaintext. Objects are split after they are encrypted — not before.

03

HostIO fans out: 80 data + 40 parity across 120 hosts

HostIO manages the contracts with each of the 120 independent storage providers in your VPD. It shards every object into 80 data and 40 parity pieces and distributes them. No single host holds a reconstructable copy. No single datacenter. An object is lost only if more than 40 of its 120 shards fail before active repair triggers.

04

Local PostgreSQL shard maps — nothing phones home

Repeat reads hit the local LRU cache first. Cold reads race 120 sectors — first 80 win — and cache the result. The Relayer runs the full database locally; nothing phones home to reconstruct your file map.

05

Tiny files skip the fan-out entirely

Files ≤256 bytes are stored inline in the database. Agent scratch files, per-step artifacts, small config objects — they bypass the 120-host erasure-coding path entirely. Same S3 API, no overhead.

Operations Center

Watch your network. Live.

The Operations Center maps every host in your VPD in real time — 786 providers shown, 893 active globally, 23.6 PB network capacity across 48 countries. HostIO’s System Overview panel surfaces data hosts, parity hosts, cache state, CPU, network throughput, and redundancy rating at a glance.

XNS Relayer Operations Center — world map of live provider nodes, stat cards showing 786 VPD providers, 893 active hosts, 23.6 PB capacity, 48 countries, and System Overview panel with HostIO data and parity host counts

What it can do

Real S3 gateway. Proven on hardware.

Our own Go implementation — not a shim, not a proxy. Validated against the ceph/s3-tests suite on real hardware. Every operation your tool already uses works on the first request.

Real S3 Gateway

Our own Go code. Not a shim.

Object CRUD, multipart upload, presigned URLs, ListObjectsV2, CopyObject. Validated against the ceph/s3-tests suite on real hardware. Change one endpoint — every tool that speaks S3 already works.

Early Access

Install by talking to Claude.

Add @xns-cloud/relayer-mcp to Claude Desktop or Claude Code. Say "Install the XNS Relayer." It handles the rest — checks your system, starts the Relayer, verifies storage.

Computed Durability

Eleven nines, computed — not rounded up.

Derived by real binomial math over the 80+40 / 120-host layout, using the open-source starius/nevents algorithm. We show the method. You can verify it.

Early Access

Keyless, scoped credentials via OIDC.

A workload exchanges its IdP token for a scoped, short-lived S3 session. No static key to leak. AssumeRoleWithWebIdentity — JWT verified, session scoped to a role, expires on its own.

$0.006/GB-mo
Cheapest to hold

$0 egress
Move data in and out free

S3-native
boto3 · rclone · restic · aws-cli

11 nines
Durability · see the math →

Pricing

The egress tax, removed

$6.00/TB-mo to hold. $0 to read — whether it’s one query or ten million. 30-day minimum retention.

AWS S3

10 TB stored, read 30× / month

~$27,230

~$230 storage + ~$27,000 egress
300 TB out × ~$0.09/GB

vs.
XNS Relayer

Same 10 TB, same 30 reads

~$60

$60.00 storage
$0 egress. Uncapped.

Egress, not storage, is the whole story for a read-amplifying workload. XNS removes the variable that punishes agents. Cheaper per-GB than Wasabi and Backblaze, with uncapped $0 egress and no 90-day minimum retention.

Who it is for

Three workloads where the egress meter costs you most.

Same S3 API, same tools. The bill looks different when reads are free.

Lead vertical

Agentic / AI Workflows

Your agent re-reads its knowledge base on every query loop. On AWS, every read is metered. On XNS, reads are free. RAG pipelines, training datasets, checkpoint artifacts — same S3 SDK you already use, no egress bill as the agent scales.

​

Backup / Disaster Recovery

Cheaper than Wasabi and Backblaze. Uncapped free restores — test your DR plan as often as you want. No 90-day minimum retention trap. Works with restic and rclone out of the box.

​

Video / VMS Storage

Cheap per-GB retention at scale. Free footage review and export — no rehydration cost. Data-residency control via your own node selection. Works with VMS platforms that support an S3 object back-end.

Storage you can prove. Reads that cost nothing.

Install the Relayer

See the S3 compatibility matrix

What changed since you last tried XNS
Claims on this page last verified

Product

Why XNS

Company

Legal