Get a post-quantum ML-DSA-65 signature (FIPS 204, scheme 4099 — the same scheme the Animic
Get a post-quantum ML-DSA-65 signature (FIPS 204, scheme 4099 — the same scheme the Animica L1 admits transactions with) over a document you never have to send us. Post a sha256 digest, or post a JSON payload and we canonicalise and hash it here; either way the signature covers the HASH, so the resulting envelope can be published, escrowed or put on-chain without disclosing the content. Buy this when a claim has to stay checkable by a third party years from now — a dataset manifest, a model card, an audit-log segment, a delivery receipt between two agents, the exact bytes of an agreement — because an HMAC proves nothing to anyone but its issuer and an ECDSA signature made today is retrospectively forgeable once a cryptographically-relevant quantum computer exists. You need no PQ library and no key of your own. Verification is FREE (POST /x402/pq/sign/verify) and the signing public key is FREE (GET /x402/pq/sign/pubkey), so anyone can check an envelope offline without paying us. The signed statement records whether YOU or WE computed the digest, because those are different claims. If the signer or its key is not reachable you get a 503 with the reason and are NOT charged — this endpoint has no branch that returns an unsigned envelope.
6000 (raw units)
price
1
calls / 30d
1
unique payers
2026-08-22
updated
Provider
animica.dev · discovered, not yet claimed by its owner
Payment (x402 accepts[])
[
{
"scheme": "exact",
"network": "eip155:8453",
"payTo": "0x5D17c40FD6b119dc6006C4Ab3C20a917FCaB2aCD",
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"amount": "6000",
"maxTimeoutSeconds": 60
},
{
"scheme": "exact",
"network": "animica:1",
"payTo": "anim1zqpsmegc0qcvzjfukm89xs0zeu3eqyyyel7kelehuszvwfarqypky2gr946ga",
"asset": "ANM",
"amount": "71270193221",
"maxTimeoutSeconds": 60
}
]Output schema
{
"animica": {
"catalog": "https://animica.dev/.well-known/x402",
"content_type": "application/json",
"currency": "USDC",
"description": "Get a post-quantum ML-DSA-65 signature (FIPS 204, scheme 4099 — the same scheme the Animica L1 admits transactions with) over a document you never have to send us. Post a sha256 digest, or post a JSON payload and we canonicalise and hash it here; either way the signature covers the HASH, so the resulting envelope can be published, escrowed or put on-chain without disclosing the content. Buy this when a claim has to stay checkable by a third party years from now — a dataset manifest, a model card, an audit-log segment, a delivery receipt between two agents, the exact bytes of an agreement — because an HMAC proves nothing to anyone but its issuer and an ECDSA signature made today is retrospectively forgeable once a cryptographically-relevant quantum computer exists. You need no PQ library and no key of your own. Verification is FREE (POST /x402/pq/sign/verify) and the signing public key is FREE (GET /x402/pq/sign/pubkey), so anyone can check an envelope offline without paying us. The signed statement records whether YOU or WE computed the digest, because those are different claims. If the signer or its key is not reachable you get a 503 with the reason and are NOT charged — this endpoint has no branch that returns an unsigned envelope.",
"documentation": "https://animica.dev/x402#product-pq_sign",
"name": "Post-quantum document signature (ML-DSA-65)",
"openapi": "https://animica.dev/x402/openapi.json",
"price": "0.006000",
"product": "pq_sign",
"provider": "Animica",
"terms": {
"amount_atomic": "6000",
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"chain_id": 8453,
"network": "eip155:8453",
"pay_to": "0x5D17c40FD6b119dc6006C4Ab3C20a917FCaB2aCD",
"scheme": "exact"
},
"x402_version": 2
},
"bazaar": {
"discoverable": true,
"info": {
"input": {
"method": "POST",
"type": "http"
},
"output": {
"type": "json"
}
},
"schema": {
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"properties": {
"body": {
"properties": {
"digest": {
"description": "64 hex characters — the 32-byte digest of your document. Send this OR payload, never both. Your document never leaves your side.",
"type": "string"
},
"digest_alg": {
"description": "how YOU computed digest, recorded in the signature as your declaration: sha256, sha3-256, keccak-256, blake2b-256. Omit it and the signature says sha256 with document_digest_alg_source:'assumed_default' — a default, marked as one, never presented as something you stated. With payload it must be omitted or sha256, which is what we run.",
"type": "string"
},
"label": {
"description": "your own annotation for what this covers, up to 128 printable ASCII characters; signed, and marked in the envelope as the client's claim",
"type": "string"
},
"payload": {
"description": "a JSON value to canonicalise and SHA-256 here instead of sending a digest. Hashed and dropped: never stored, logged or returned.",
"type": "object"
}
},
"type": "object"
},
"method": {
"enum": [
"POST"
],
"type": "string"
},
"queryParams": {
"properties": {
"digest": {
"description": "same as body.digest, for GET callers",
"type": "string"
},
"digest_alg": {
"description": "same as body.digest_alg",
"type": "string"
},
"label": {
"description": "same as body.label",
"type": "string"
}
},
"type": "object"
},
"type": {
"const": "http",
"type": "string"
}
},
"required": [
"type",
"method"
],
"type": "object"
},
"output": {
"properties": {
"example": {},
"type": {
"type": "string"
}
},
"required": [
"type"
],
"type": "object"
}
},
"required": [
"input"
],
"type": "object"
}
},
"discovery": {
"discoverable": true,
"info": {
"input": {
"bodyFields": {
"digest": {
"description": "64 hex characters — the 32-byte digest of your document. Send this OR payload, never both. Your document never leaves your side.",
"required": false,
"type": "string"
},
"digest_alg": {
"description": "how YOU computed digest, recorded in the signature as your declaration: sha256, sha3-256, keccak-256, blake2b-256. Omit it and the signature says sha256 with document_digest_alg_source:'assumed_default' — a default, marked as one, never presented as something you stated. With payload it must be omitted or sha256, which is what we run.",
"required": false,
"type": "string"
},
"label": {
"description": "your own annotation for what this covers, up to 128 printable ASCII characters; signed, and marked in the envelope as the client's claim",
"required": false,
"type": "string"
},
"payload": {
"description": "a JSON value to canonicalise and SHA-256 here instead of sending a digest. Hashed and dropped: never stored, logged or returned.",
"required": false,
"type": "object"
}
},
"bodyType": "json",
"method": "POST",
"queryParams": {
"digest": {
"description": "same as body.digest, for GET callers",
"type": "string"
},
"digest_alg": {
"description": "same as body.digest_alg",
"type": "string"
},
"label": {
"description": "same as body.label",
"type": "string"
}
},
"type": "http"
},
"output": {
"description": "alg, scheme_id, scheme, digest, digest_alg, digest_alg_source (client_declared|assumed_default|gateway_computed), digest_source (client|gateway), canonical_bytes, label, signature, public_key, key_id, signed_at, commitment {type, document_digest, document_digest_alg, document_digest_alg_source, digest_source, canonical_bytes, canonicalisation, client_label}, envelope {kind, canonical_form, digest, payload, verification} (the self-contained object to publish or POST back), commitment_digest, commitment_digest_alg, binding, verify {endpoint, url, price}, public_key_endpoint, took_ms, payload_disclosed:false",
"type": "json"
}
}
}
}Use it
curl
curl "https://animica.dev/x402/pq/sign" # -> 402 Payment Required, accepts[] lists how to pay # retry with a PAYMENT-SIGNATURE (or PAYMENT header) once paid
JavaScript
const res = await fetch("https://animica.dev/x402/pq/sign");
if (res.status === 402) {
const { accepts } = await res.json();
// pay one of accepts[] via an x402 client, then retry with the payment header
}Python
import httpx
res = httpx.get("https://animica.dev/x402/pq/sign")
if res.status_code == 402:
accepts = res.json()["accepts"]
# pay one of accepts[] via an x402 client, then retry with the payment headerMachine-readable
Everything on this page is also available as clean JSON at /resources/7542.json, and this resource appears in /discovery/resources and /discovery/search.