These are observations, not accusations. A band of LOW, MEDIUM or HIGH describes how much of what we check we were able to confirm — it is not a judgement about the operator of an endpoint. Every signal, its weight and its rationale are published on the methodology page, and any operator can claim an endpoint, correct a fact or opt out.
What does this x402 endpoint charge?
0.025204 USDC per request
https://api.babyblueviper.com/signals/full
Risk band: LOW
100/100
Endpoint
| URL | https://api.babyblueviper.com/signals/full |
|---|---|
| Canonical | https://api.babyblueviper.com/signals/full |
| Endpoint id | 00f5b4eb07eac39c30cae837047be08f |
| HTTP status | 402 |
| Latency | 405 ms |
| Redirects | 0 |
| TLS | handshake okThe negotiated TLS version is not exposed to a Worker. |
| Wire form | both the v2 header and a v1 body |
| Bytes read | 2825 |
| Strict decoder | accepteddecodePaymentRequired, imported from tx402 — the same code the SDK runs before it pays. |
Payment
accepted by the decoderThese terms were accepted by the strict decoder tx402 uses before it pays.
| Price | 0.025204 USDC |
|---|---|
| Amount (atomic) | 25204 |
| Scheme | exact |
| Network | eip155:8453 in manifestRecognized means present in the tx402 signed release manifest. Nothing more is claimed. |
| Asset | USDC 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 in manifestRecognized means present in the tx402 signed release manifest. Nothing more is claimed. |
| Pay to | 0x161DbdD73D025E9aEdd4918a67c28e5bf9A87Fb9 |
| Pay to declared dynamic | nox402 v2 has no on-the-wire declaration of a dynamic payTo, so this is usually unobservable. |
| Authorization window | 60s |
| Resource | https://api.babyblueviper.com/signals/full |
| MIME type | application/json |
| Description | invinoveritas /signals/full — the live Hyperliquid perps read our own bot enters on, recomputable per coin from the raw metrics we return (funding + 24h delta, |
| Facilitator | not observed |
This endpoint offers 2 ways to pay. The card above describes the first, which is the order the server stated its own preference in.
| Alternative 2 | 25203 (atomic units) · xrpl:0 · exact |
|---|
Risk
Band: LOW 100/100 · v1 · static_onlyA band describes how much of what we check we were able to confirm. It is not a judgement about the operator of an endpoint.
- Result: pass 25 The challenge decodes under the strict x402 decoder tx402 uses before paying. challenge_decodes
- Result: pass 15 The challenge describes the endpoint that served it. resource_origin_match
- Result: pass 12 The amount is a canonical atomic integer. amount_canonical
- Result: pass 12 The recipient is a well-formed address for the declared network. pay_to_wellformed
- Result: pass 8 The network is in the tx402 signed release manifest. network_recognized
- Result: pass 8 The asset is in the tx402 signed release manifest for this network. asset_recognized
- Result: skip — The challenge named no facilitator. facilitator_known
- Result: pass 6 The payment scheme is one tx402 can route. scheme_known
- Result: pass 5 The endpoint was reached over a valid TLS connection. tls_ok
- Result: pass 4 The authorization window is within the maximum tx402 will sign for. timeout_sane
- Result: pass 3 No redirect downgraded the connection. redirect_scheme_downgrade
- Result: pass 3 The endpoint serves the x402 v2 header form. wire_form
- Result: pass 2 The amount is within the range we see for x402 endpoints. amount_magnitude_band
Security
nothing failing
A check that could not run reports skip, and a skip is never counted as a pass.
- Result: pass wire_form_detected Served as both.
- Result: pass base64_strict The strict decoder accepted the header's base64 framing.
- Result: pass json_wellformed
- Result: pass x402_version_known Declared x402Version 2.
- Result: pass accepts_present The challenge offers 2 ways to pay.
- Result: pass size_within_limit Read 2825 bytes, within the probe's cap.
- Result: pass network_caip2_wellformed network: eip155:8453
- Result: pass network_recognized Recognized means present in the tx402 signed release manifest.
- Result: pass asset_recognized Recognized means present in the tx402 signed release manifest.
- Result: pass amount_atomic_canonical
- Result: pass amount_positive
- Result: pass pay_to_wellformed
- Result: pass max_timeout_sane
- Result: pass resource_origin_match
- Result: pass scheme_known
- Result: skip facilitator_known The challenge named no facilitator.
- Result: pass mime_type_wellformed mimeType: application/json
- Result: pass extra_wellformed `extra` carries 2 field(s), preserved verbatim.
- Result: skip amount_within_observed_range needs our data No prior observations of this endpoint.
- Result: skip recipient_matches_observed needs our data No prior observations of this endpoint.
Observed
| First seen | 2026-08-15T04:00:12Z |
|---|---|
| Last seen | 2026-08-15T14:32:49Z |
| Scans recorded | 2 |
| Availability (30d) | not measured yet |
| Latency p50 | not measured yet |
| 2026-08-15T05:45:46Z | first_seen: challenge_hash — → 338e37819ff870ce91b605886e1f8de0ecd7ed4654ba4f046623c7a671546d9c |
|---|
Test with tx402 →
Pre-filled with this endpoint's real terms. Your signer stays in your process — this service never sees a key, never asks for one, and cannot build a payment.
CLI — dry run, nothing is signed
npx tx402 call "https://api.babyblueviper.com/signals/full" \
--max-spend "0.025204 USDC" \
--network "eip155:8453" \
--dry-run
# --dry-run stops after the policy decision. Nothing is signed and nothing is spent.
TypeScript
import { createTx402Client } from "tx402";
// Your signer stays in your process. tools.tx402.io never sees a key,
// never asks for one, and cannot build a payment.
import { signers } from "./signers.js";
const tx402 = createTx402Client({
signers,
policy: {
maxPerRequest: "0.025204 USDC",
allowedDomains: ["api.babyblueviper.com"],
allowedNetworks: ["eip155:8453"],
},
});
// Policy and budget are committed before the signer is reachable, so a
// refusal here is a payment that was never authorized.
const response = await tx402.fetch("https://api.babyblueviper.com/signals/full");
Python
from tx402 import Tx402Client, Policy
# Your signer stays in your process. tools.tx402.io never sees a key,
# never asks for one, and cannot build a payment.
tx402 = Tx402Client(
evm_signer=evm,
policy=Policy(
max_per_request="0.025204 USDC",
allowed_domains=["api.babyblueviper.com"],
allowed_networks=["eip155:8453"],
),
)
# Policy and budget are committed before the signer is reachable, so a
# refusal here is a payment that was never authorized.
response = tx402.fetch("https://api.babyblueviper.com/signals/full")
This report, as JSON or Markdown
curl -sS 'https://tools.tx402.io/api/v1/inspect?url=https%3A%2F%2Fapi.babyblueviper.com%2Fsignals%2Ffull'
# The same result as Markdown, for a terminal or an agent:
curl -sS -H 'Accept: text/markdown' 'https://tools.tx402.io/inspect?url=https%3A%2F%2Fapi.babyblueviper.com%2Fsignals%2Ffull'
The challenge, as served
Public data: the endpoint serves this to anyone who asks. It is shown exactly as it arrived, truncated to the documented cap.
raw challenge
eyJ4NDAyVmVyc2lvbiI6MiwiZXJyb3IiOiJYLVBBWU1FTlQgaGVhZGVyIHJlcXVpcmVkIiwicmVzb3VyY2UiOnsidXJsIjoiaHR0cHM6Ly9hcGkuYmFieWJsdWV2aXBlci5jb20vc2lnbmFscy9mdWxsIiwiZGVzY3JpcHRpb24iOiJpbnZpbm92ZXJpdGFzIC9zaWduYWxzL2Z1bGwgXHUyMDE0IHRoZSBsaXZlIEh5cGVybGlxdWlkIHBlcnBzIHJlYWQgb3VyIG93biBib3QgZW50ZXJzIG9uLCByZWNvbXB1dGFibGUgcGVyIGNvaW4gZnJvbSB0aGUgcmF3IG1ldHJpY3Mgd2UgcmV0dXJuIChmdW5kaW5nICsgMjRoIGRlbHRhLCIsIm1pbWVUeXBlIjoiYXBwbGljYXRpb24vanNvbiIsInNlcnZpY2VOYW1lIjoiaW52aW5vdmVyaXRhcyIsInRhZ3MiOlsiYWktYWdlbnQiLCJhbmFseXRpY3MiLCJzbWFydC1tb25leSIsImZpbmFuY2UiLCJkZWZpIl0sImljb25VcmwiOiJodHRwczovL2FwaS5iYWJ5Ymx1ZXZpcGVyLmNvbS9zdGF0aWMvbG9nby5wbmcifSwiYWNjZXB0cyI6W3sic2NoZW1lIjoiZXhhY3QiLCJuZXR3b3JrIjoiZWlwMTU1Ojg0NTMiLCJhc3NldCI6IjB4ODMzNTg5ZkNENmVEYjZFMDhmNGM3QzMyRDRmNzFiNTRiZEEwMjkxMyIsImFtb3VudCI6IjI1MjA0IiwicGF5VG8iOiIweDE2MURiZEQ3M0QwMjVFOWFFZGQ0OTE4YTY3YzI4ZTViZjlBODdGYjkiLCJtYXhUaW1lb3V0U2Vjb25kcyI6NjAsImV4dHJhIjp7Im5hbWUiOiJVU0QgQ29pbiIsInZlcnNpb24iOiIyIn19LHsic2NoZW1lIjoiZXhhY3QiLCJuZXR3b3JrIjoieHJwbDowIiwiYW1vdW50IjoiMjUyMDMiLCJhc3NldCI6IlhSUCIsInBheVRvIjoicmhGSHp0alM2M2g2ZnM1dlhnVG90dUw3anN1cnlVdkRTRiIsInJlc291cmNlIjoiaHR0cHM6Ly9hcGkuYmFieWJsdWV2aXBlci5jb20vc2lnbmFscy9mdWxsIiwiZGVzY3JpcHRpb24iOiJpbnZpbm92ZXJpdGFzIC9zaWduYWxzL2Z1bGwgXHUyMDE0IHRoZSBsaXZlIEh5cGVybGlxdWlkIHBlcnBzIHJlYWQgb3VyIG93biBib3QgZW50ZXJzIG9uLCByZWNvbXB1dGFibGUgcGVyIGNvaW4gZnJvbSB0aGUgcmF3IG1ldHJpY3Mgd2UgcmV0dXJuIChmdW5kaW5nICsgMjRoIGRlbHRhLCBiYXNpcywgb3BlbiBpbnRlcmVzdCwgdm9sLWV4cGFuc2lvbiByZWdpbWUsIEJUQyBEVk9MKSBcdTIwMTQgY2hlY2thYmxlIGZhY3RzLCBub3QgYSBibGFjay1ib3ggc2NvcmUuIENvbXB1dGVkIGF0IGNhbGwgdGltZSBmcm9tIHRoZSB2ZW51ZSB3ZSB0cmFkZSwgbm90IGEgc3RhbGUgaGlzdG9yaWNhbCBkdW1wLiBUaGUgdHJhZGVzIG91ciBvd24gY2FwaXRhbCBtYWtlcyBvbiB0aGVzZSBzaWduYWxzIHNldHRsZSBvbiB0aGUgcHVibGljIGxlZGdlciAoYXBpLmJhYnlibHVldmlwZXIuY29tL2xlZGdlciksIHdpbnMgYW5kIGxvc3Nlcy4gQSBkYXRhIGZlZWQsIG5vdCBmaW5hbmNpYWwgYWR2aWNlLiBQYWlyIHdpdGggL3JldmlldyB0byBnYXRlIHRoZSB0cmFkZSB5b3UgZm9ybSBvbiBpdC4gRnJlZSB0ZWFzZXIgYXQgR0VUIC9zaWduYWxzLiBQYXktcGVyLWNhbGwgaW4gVVNEQyBvbiBCYXNlLCBubyBzdWJzY3JpcHRpb24uIFx1MjAyMiBPciBnZXQgaXQgYWxsIGluIG9uZSBnb3Zlcm5lZCBjYWxsIFx1MjAxNCByZWFzb24gKyB0aGlzICsgbWVtb3J5LCBwYXNzZWQgdGhyb3VnaCBnb3Zlcm5hbmNlIGFuZCByZW1lbWJlcmVkIHRvIHlvdXIgd2FsbGV0LWtleWVkIGhvbWUgXHUyMDE0IGZvciBsZXNzIHRoYW4gdGhlIHN1bTogUE9TVCAvcmVzaWRlbmNlL2FjdCAoYSBob21lIGZvciB5b3VyIGFnZW50KS4iLCJtYXhUaW1lb3V0U2Vjb25kcyI6NjAsImV4dHJhIjp7Imludm9pY2VJZCI6IjYwZGI4MDI3ZWJkMjBmZTM4OGZmNTVmYTU3ZWE2NWQ2Iiwic291cmNlVGFnIjo4MDQ2ODE0Njh9fV0sImV4dGVuc2lvbnMiOnsiYmF6YWFyIjp7ImluZm8iOnsiaW5wdXQiOnsidHlwZSI6Imh0dHAiLCJtZXRob2QiOiJHRVQifSwib3V0cHV0Ijp7InR5cGUiOiJqc29uIiwiZXhhbXBsZSI6eyJzY2hlbWEiOiJpbnZpbm92ZXJpdGFzLnNpZ25hbHMudjEiLCJ0ZWFzZXIiOmZhbHNlLCJ2ZW51ZSI6Imh5cGVybGlxdWlkIiwic2lnbmFscyI6W3siY29pbiI6IkJUQyIsImZ1bmRpbmdfcmF0ZV9ob3VybHkiOjEuMjVlLTA1LCJmdW5kaW5nX2RlbHRhXzI0aCI6My41ZS0wNywiYmFzaXNfYnBzIjotMS45Niwib3Blbl9pbnRlcmVzdF91c2QiOjIyMzAyNzA0MzIuMCwidm9sX2V4cGFuc2lvbl9yYXRpbyI6MC43NywicmVnaW1lIjoiY29tcHJlc3Npb24iLCJyZWFsaXplZF92b2xfMTVtX3BjdCI6MC4xNn1dLCJidGNfZHZvbCI6eyJkdm9sIjozNy4xNiwic3RhbGUiOmZhbHNlfSwiZGlzY2xhaW1lciI6IkRlcml2YXRpdmVzIG1hcmtldC1kYXRhIGZlZWQsIG5vdCBmaW5hbmNpYWwgYWR2aWNlLiJ9fX0sInNjaGVtYSI6eyIkc2NoZW1hIjoiaHR0cHM6Ly9qc29uLXNjaGVtYS5vcmcvZHJhZnQvMjAyMC0xMi9zY2hlbWEiLCJ0eXBlIjoib2JqZWN0IiwicHJvcGVydGllcyI6eyJpbnB1dCI6eyJ0eXBlIjoib2JqZWN0IiwicHJvcGVydGllcyI6eyJ0eXBlIjp7InR5cGUiOiJzdHJpbmciLCJjb25zdCI6Imh0dHAifSwibWV0aG9kIjp7InR5cGUiOiJzdHJpbmciLCJlbnVtIjpbIkdFVCIsIkhFQUQiLCJERUxFVEUiXX0sInF1ZXJ5UGFyYW1zIjp7InR5cGUiOiJvYmplY3QiLCJwcm9wZXJ0aWVzIjp7fX19LCJyZXF1aXJlZCI6WyJ0eXBlIiwibWV0aG9kIl0sImFkZGl0aW9uYWxQcm9wZXJ0aWVzIjpmYWxzZX0sIm91dHB1dCI6eyJ0eXBlIjoib2JqZWN0IiwicHJvcGVydGllcyI6eyJ0eXBlIjp7InR5cGUiOiJzdHJpbmcifSwiZXhhbXBsZSI6eyJ0eXBlIjoib2JqZWN0In19LCJyZXF1aXJlZCI6WyJ0eXBlIl19fSwicmVxdWlyZWQiOlsiaW5wdXQiXX19fX0=SHA-256 of the canonicalized challenge: 54cb560890614dcc9e89e5519121ead9a537aa1a67e7278afca104f27e7e48c8
Raw signals
The exact input the scoring function was given. A signal we could not determine has
observed: false and contributes nothing to the score — it is never counted as a failure.
signals
[
{
"id": "probe_ok",
"value": true,
"observed": true,
"detail": null
},
{
"id": "challenge_served",
"value": true,
"observed": true,
"detail": null
},
{
"id": "challenge_decodes",
"value": true,
"observed": true,
"detail": null
},
{
"id": "wire_form",
"value": "both",
"observed": true,
"detail": null
},
{
"id": "x402_version",
"value": 2,
"observed": true,
"detail": null
},
{
"id": "tls_ok",
"value": true,
"observed": true,
"detail": null
},
{
"id": "tls_protocol",
"value": null,
"observed": false,
"detail": "The negotiated TLS version is not exposed to the probe."
},
{
"id": "redirect_count",
"value": 0,
"observed": true,
"detail": null
},
{
"id": "redirect_scheme_downgrade",
"value": false,
"observed": true,
"detail": "Cross-scheme redirects are refused."
},
{
"id": "resource_origin_match",
"value": true,
"observed": true,
"detail": null
},
{
"id": "network_recognized",
"value": true,
"observed": true,
"detail": "Recognized means present in the tx402 signed release manifest."
},
{
"id": "asset_recognized",
"value": true,
"observed": true,
"detail": "Recognized means present in the tx402 signed release manifest."
},
{
"id": "facilitator_known",
"value": null,
"observed": false,
"detail": "The challenge named no facilitator."
},
{
"id": "amount_canonical",
"value": true,
"observed": true,
"detail": null
},
{
"id": "amount_magnitude_band",
"value": "small",
"observed": true,
"detail": null
},
{
"id": "pay_to_wellformed",
"value": true,
"observed": true,
"detail": null
},
{
"id": "pay_to_declared_dynamic",
"value": false,
"observed": true,
"detail": null
},
{
"id": "timeout_sane",
"value": true,
"observed": true,
"detail": null
},
{
"id": "scheme_known",
"value": true,
"observed": true,
"detail": null
},
{
"id": "requirement_count",
"value": 2,
"observed": true,
"detail": null
},
{
"id": "challenge_size_bytes",
"value": 2825,
"observed": true,
"detail": null
},
{
"id": "first_seen_age_days",
"value": null,
"observed": false,
"detail": "No history yet."
},
{
"id": "scan_count",
"value": null,
"observed": false,
"detail": "No history yet."
},
{
"id": "availability_30d",
"value": null,
"observed": false,
"detail": "No history yet."
},
{
"id": "latency_p50_ms",
"value": null,
"observed": false,
"detail": "No history yet."
},
{
"id": "price_changes_90d",
"value": null,
"observed": false,
"detail": "No history yet."
},
{
"id": "recipient_changes_90d",
"value": null,
"observed": false,
"detail": "No history yet."
},
{
"id": "recipient_unstable_undeclared",
"value": null,
"observed": false,
"detail": "No history yet."
},
{
"id": "terms_changed_within_24h",
"value": null,
"observed": false,
"detail": "No history yet."
}
]