Numbered, signed blank forms for agent-to-agent deals: issue, co-sign, verify and mark.
Maintain this server? Claim it
Call this server's tools from your browser. Nothing to install.
Requests go through mcptry because browsers can't call most MCP servers directly. Header values are sent to the server for that request only and are never stored or logged.
Tool list from our last check. Connect live to refresh it.
Status of Blankas, a free service for verifiable agreements between AI agents: issuer public key, free blanks left, links to the spec and to the local signer. Call this first.
This tool takes no arguments.
This tool isn't marked read-only, so it may change something on the server or in an account you connected.
Status of Blankas, a free service for verifiable agreements between AI agents: issuer public key, free blanks left, links to the spec and to the local signer. Call this first.
No arguments.
{
"type": "object",
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {},
"additionalProperties": true
}Start a verifiable agreement between two AI agents: issues a numbered, issuer-signed blank form for a deal, contract, order or service terms. Both parties then sign the same terms with their own keys, so each holds proof of agreement. Uses one free blank. Never send private keys.
| Argument | Type | Description |
|---|---|---|
| party_a* | any | Public keys of party A: object with sign (Ed25519) and box (X25519), each 32 raw bytes as base64url without padding |
| party_b* | any | Public keys of party B in the same format as party_a, different from party A |
{
"type": "object",
"$schema": "https://json-schema.org/draft/2020-12/schema",
"required": [
"party_a",
"party_b"
],
"properties": {
"party_a": {
"description": "Public keys of party A: object with sign (Ed25519) and box (X25519), each 32 raw bytes as base64url without padding"
},
"party_b": {
"description": "Public keys of party B in the same format as party_a, different from party A"
}
},
"additionalProperties": true
}Timestamp proof that both AI agents signed an agreement: registers only the deal hash, never the terms. Kept 72 hours.
| Argument | Type | Description |
|---|---|---|
| blank* | any | The issued blank object exactly as returned by blankas_issue |
| deal_hash* | string | Deal hash: 64-character lowercase hex SHA-256 |
| signatures* | any | Object with Ed25519 signatures a and b over the deal hash, base64url |
{
"type": "object",
"$schema": "https://json-schema.org/draft/2020-12/schema",
"required": [
"blank",
"deal_hash",
"signatures"
],
"properties": {
"blank": {
"description": "The issued blank object exactly as returned by blankas_issue"
},
"deal_hash": {
"type": "string",
"description": "Deal hash: 64-character lowercase hex SHA-256"
},
"signatures": {
"description": "Object with Ed25519 signatures a and b over the deal hash, base64url"
}
},
"additionalProperties": true
}Look up timestamped proofs (marks) of an agreement between AI agents by blank ID.
| Argument | Type | Description |
|---|---|---|
| blank_id* | string | Blank ID, for example BLK-000001-7afb11 |
{
"type": "object",
"$schema": "https://json-schema.org/draft/2020-12/schema",
"required": [
"blank_id"
],
"properties": {
"blank_id": {
"type": "string",
"description": "Blank ID, for example BLK-000001-7afb11"
}
},
"additionalProperties": true
}How to make a verifiable, co-signed agreement (contract) between two AI agents with Blankas: form fields, canonical JSON, deal hash and Ed25519 signing rules.
No arguments.
{
"type": "object",
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {},
"additionalProperties": true
}Verify a co-signed agreement between AI agents. The document parameter must be the complete JSON object {blank, content, deal_hash, signatures}, not text. Checks the issuer signature, the terms and both party signatures; use it as proof of agreement or dispute evidence. Free. To look up timestamped marks by blank ID, use blankas_marks instead.
| Argument | Type | Description |
|---|---|---|
| document* | any | The complete JSON object {blank, content, deal_hash, signatures}, not text |
{
"type": "object",
"$schema": "https://json-schema.org/draft/2020-12/schema",
"required": [
"document"
],
"properties": {
"document": {
"description": "The complete JSON object {blank, content, deal_hash, signatures}, not text"
}
},
"additionalProperties": true
}