Specialist models, one request
Lightning-fast
AI microservices
Too small for an LLM, too costly to host yourself: Chersus runs purpose-built micro-model APIs, sub-50ms, billed per character, on sovereign EU infrastructure. Convenience without the bill, economics without the headcount.
Free up to 1M characters a month. No credit card.
curl -X POST https://api.chersus.com/v1/run \ -H "Authorization: Bearer chrs_live_YOUR_KEY" \ -H "Content-Type: application/json" \ -d '{ "type": "text", "input": "Contact Jane Doe at jane.doe@example.com about invoice #4821.", "transform": "governance.pii.redact" }'
{
"trace_id": "chs_01J9X4Q7K2M8N3P5R6T7V8W9X0",
"status": "completed",
"output": "Contact [REDACTED] at [REDACTED] about invoice #4821.",
"transformed": { "service": "governance.pii.redact", "changes": 2 },
"checked": {},
"usage": {
"billed": { "unit": "characters", "input": 61, "output": 53, "quantity": 114 }
},
"audit": { "region": "eu-nl-1", "retention": "none", "total_ms": 26 }
}Compliance-clean licenses
Sovereign EU infrastructure
GDPR-compliant by design
Pay for traffic only
Specialists, not generalists.
Governance
Strip or tokenize personal data before it reaches a log, a warehouse, or a downstream model. Detokenize on demand, from your own token map.
Security
Catch jailbreaks, prompt injection, and toxic content before they reach your model or your users. Each check returns a verdict and a score, ready to gate on.
Routing
Classify intent and detect language without hand-rolled keyword matching. Every message lands at the right step or queue.
Data
Turn free text into typed fields, parsed addresses, and ISO dates. Structured output your systems can insert without a parsing layer of your own.
Analytics
Score sentiment and traffic patterns across everything you route through Chersus. Structured scores come back, never prose.
Content
Tell AI-written text from human writing, watermark-aware where a provenance signal exists. A verdict and a score, ready to route into a review queue.
One run
Clean and check in a single run.
One request · one transform · three checks · one bill
Input
Contact Jane Doe at
jane.doe@example.com
40 chars in
transform · hands text back
governance.pii.redact
32 chars out · 26 ms
checks · verdicts only
security.toxicity.flag
pass · 30 ms
security.jailbreak.shield
pass · 18 ms
routing.language.detect
en · 9 ms
Result
Contact [REDACTED] at [REDACTED]
toxicity pass · jailbreak pass · language en
30 ms · the slowest service
Billed 72 chars: 40 in, 32 handed back by the redaction. The three checks add latency, never cost.
One transform plus as many checks as you want in a single request, all running on your input at the same time. The response waits for the slowest service, and the bill is the characters in plus the characters the transform hands back; checks add nothing.
Read the guide to runs →Audit trace
Proof, never content.
{
"id": "redact",
"service": "governance.pii.redact",
"version": 2,
"model": "Roblox/roblox-pii-classifier-v2",
"input_sha256": "9f2c1e...a1",
"output_sha256": "6b7d44...0f",
"duration_ms": 26
}Every run returns an audit trace: SHA-256 hashes of the input and output, never the content itself. You can prove what ran, with which model and version, without exposing what was in it. You keep the receipt. We keep nothing.
Sovereign by construction.
Every request runs on sovereign EU infrastructure, across 26 cities, and never leaves European jurisdiction. Your input lives in memory for the duration of the run. We never persist, log, or train on it. When the request ends, the data is gone.
We act as processor under Art. 28 GDPR, with a simple DPA and a really short subprocessor list.
- Strictly European stack
- Hosted in the European Union
- No third-party models
- Zero retention policy
Billed per character.
Start for free
€0
for the first 1M characters each month.
Every service, at full quality, until you hit 1M characters per month.
No credit card.
Request accessPay as you go, starting from
€0.06
per 1K characters at 1M a month
That is the starting rate. Every doubling of your monthly volume cuts it by 20%.
Example monthly rates
| Volume | Rate per 1K chars | Bill |
|---|---|---|
| 100K | €0.000 | €0 |
| 1M | €0.060 | €0 |
| 10M | €0.029 | €257 |
| 100M | €0.014 | €1,349 |
| 1B | €0.006 | €6,485 |
| 10B | €0.003 | €30,931 |
The formula bills; this table illustrates.
The sweet spot.
Hyperscaler LLMs buy convenience with money. Self-hosting buys money with headcount. Both are correct on one axis and wrong on the other. The sweet spot, low cost with nothing to own, is unoccupied. That is the position Chersus holds.
Start redacting in minutes.
Create an account, copy your key, make your first run before your coffee cools.