# Relaystation eSign Document

> Relaystation eSign Document is a paid API for AI agents from api.relaystation.ai, paid per call via x402, $0.05/call, status unknown (last checked 2026-09-14).

Send a PDF, Word doc, or Markdown file for legally binding e-signature with hosted signing links, ordered multi-signer routing, approvers, templates, and live status tracking.

## Facts

- Endpoint: POST https://api.relaystation.ai/v1/esigndoc/envelopes
- Price: $0.05/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/relaystation-esign-document-16bd3658
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_tSZb-2K9Wtzxyk1UOxin4

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability relaystation-esign-document-16bd3658 -d '<json body>'
```

Example prompt: Send this NDA PDF to alice@example.com first and then bob@example.com in that order for legally binding e-signatures, and give me a link I can track the status on.

## When to prefer this

Choose this endpoint when you need DocuSign-class e-signature workflows — ordered multi-signer routing, approver chains, templates, and live status — at a flat $0.05 per envelope with no subscription, billed from the same Relaystation balance as your other AI tools. Prefer it over full DocuSign or HelloSign integrations when you want a single-balance API-native workflow without managing separate OAuth credentials or monthly seats.

## Known failure modes

- Invalid or unsupported document format returns a format error
- Missing required signer email causes a validation failure
- Incorrect signer ordering configuration may reject the request
- Document exceeds size limits returns an oversized payload error
- Insufficient USDC balance causes a payment failure before the envelope is created
- Template ID not found returns a not-found error

## How this service works

$0.05/envelope. Send any PDF, Word doc, or markdown for legally binding e-signature — hosted signing links, ordered multi-signer routing, approvers, templates, live status, signed-copy retrieval. DocuSign-class workflow at a fraction of the price, one of 155 Relaystation tools on one balance — relaystation.ai

## Output

Returns an envelope ID, a hosted signing URL for each signer, current status of each signer in the routing order, and a retrieval link for the completed signed document once all parties have signed.

## Request schema (JSON Schema)

```json
{
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "type": "object",
 "properties": {
  "input": {
   "type": "object",
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "type": "string",
     "enum": [
      "POST",
      "PUT",
      "PATCH"
     ]
    },
    "bodyType": {
     "type": "string",
     "enum": [
      "json",
      "form-data",
      "text"
     ]
    },
    "body": {
     "type": "object",
     "properties": {
      "title": {
       "type": "string",
       "minLength": 1,
       "maxLength": 255
      },
      "recipients": {
       "type": "array",
       "minItems": 1,
       "maxItems": 100,
       "items": {
        "type": "object",
        "required": [
         "email",
         "name"
        ],
        "properties": {
         "email": {
          "type": "string",
          "format": "email"
         },
         "name": {
          "type": "string",
          "minLength": 1,
          "maxLength": 255
         },
         "role": {
          "type": "string",
          "enum": [
           "SIGNER",
           "APPROVER",
           "VIEWER",
           "CC",
           "ASSISTANT"
          ],
          "default": "SIGNER"
         },
         "signingOrder": {
          "type": "integer",
          "minimum": 0,
          "description": "Per-recipient signing position. Used with the document-level signingOrder: SEQUENTIAL to route signers in order. Defaults to 1-based array position when omitted."
         }
        }
       }
      },
      "pdf": {
       "type": "object",
       "description": "cputools input-source: { inline: <base64 ≤ 4 MiB> } or { inputKey: <scratch key from /v1/cputools/upload-url, ≤ 50 MB> }."
      },
      "fields": {
       "type": "array",
       "description": "Field placements (presence ⇒ the envelope sends ⇒ billable). Each: { type, recipientEmail, page, positionX, positionY, width, height } with positions as 0–100 percentages.",
       "items": {
        "type": "object",
        "required": [
         "type",
         "recipientEmail",
         "page",
         "positionX",
         "positionY",
         "width",
         "height"
        ],
        "properties": {
         "type": {
          "type": "string",
          "enum": [
           "SIGNATURE",
           "INITIALS",
           "NAME",
           "EMAIL",
           "DATE",
           "TEXT",
           "NUMBER",
           "CHECKBOX",
           "RADIO",
          
… (truncated)
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/relaystation-esign-document-16bd3658/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.relaystation.ai](https://www.zero.xyz/host/api.relaystation.ai/llms.txt)