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The Reppo API has two surfaces with different authentication requirements. The Platform API (hosted at reppo.ai) accepts a Privy session cookie. The Chat Server and Agent API (hosted at api.reppo.xyz) use a wallet signature flow that returns a short-lived session token. Platform API endpoints — all routes under /api/v1/me/* on reppo.ai — require a valid Privy session cookie named privy-token. This cookie is set automatically when a user signs in through the Reppo web app using Privy. You do not request or manage a privy-token directly. Instead, you authenticate through the Privy SDK or web UI, and the resulting cookie is sent automatically with every subsequent request to reppo.ai. Send the cookie in the Cookie header: 
curl https://reppo.ai/api/v1/me/pods \
  -H "Cookie: privy-token=<your-privy-token>"
A missing or expired cookie returns 401 Unauthorized: 
{ "error": "Unauthorized" }

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Method 2: Wallet signature auth

The Chat Server and Agent API at api.reppo.xyz use a two-step wallet authentication flow based on EIP-191 personal_sign. Successful authentication returns a session token valid for 24 hours.
1

Request a nonce

Send your wallet address to POST https://api.reppo.xyz/auth/nonce. The server returns a unique nonce and a pre-formatted message for you to sign. Nonces expire after 5 minutes.
curl -X POST https://api.reppo.xyz/auth/nonce \
  -H "Content-Type: application/json" \
  -d '{"walletAddress": "0x742d35Cc6634C0532925a3b844Bc9e7595f2bD18"}'
Response:
{
  "nonce": "a1b2c3d4-e5f6-7890-abcd-ef1234567890",
  "message": "Sign this message to authenticate with Reppo.\n\nNonce: a1b2c3d4-e5f6-7890-abcd-ef1234567890"
}
​
walletAddress
string
required
Your Ethereum wallet address, 0x-prefixed, 40 hex characters.
2

Sign the message

Sign the message string from the nonce response using your wallet’s personal_sign (EIP-191) method. How you do this depends on your wallet library — for example, with ethers.js:
const signature = await signer.signMessage(nonceResponse.message);
3

Verify the signature

Send your wallet address, the signature, and the nonce to POST https://api.reppo.xyz/auth/verify. On success, you receive a 24-hour session token.
curl -X POST https://api.reppo.xyz/auth/verify \
  -H "Content-Type: application/json" \
  -d '{
    "walletAddress": "0x742d35Cc6634C0532925a3b844Bc9e7595f2bD18",
    "signature": "0xabc123...",
    "nonce": "a1b2c3d4-e5f6-7890-abcd-ef1234567890"
  }'
Response:
{
  "token": "eyJhbGci...",
  "walletAddress": "0x742d35cc6634c0532925a3b844bc9e7595f2bd18"
}
​
walletAddress
string
required
The same wallet address you sent to /auth/nonce.
​
signature
string
required
The EIP-191 signature of the message returned by /auth/nonce.
​
nonce
string
required
The UUID nonce returned by /auth/nonce. Must be used within 5 minutes.
4

Use the session token

Pass the token as a Bearer token in the Authorization header for all subsequent calls to api.reppo.xyz:
curl https://api.reppo.xyz/chat \
  -H "Authorization: Bearer eyJhbGci..." \
  -H "Content-Type: application/json" \
  -d '{"message": "What is a datanet on Reppo?"}'
The token expires after 24 hours. When it does, repeat the nonce → sign → verify flow to get a new one.

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Agent bearer token

If you are building an automated agent, register it at POST https://reppo.ai/api/v1/agents/register to receive a dedicated accessToken. Use this token as a Bearer token for agent-specific platform endpoints: 
curl https://reppo.ai/api/v1/agents/register \
  -H "Content-Type: application/json" \
  -d '{
    "name": "My Data Agent",
    "description": "Discovers and curates AI training data from social media"
  }'
Response: 
{
  "data": {
    "id": "agent_abc123",
    "accessToken": "agt_...",
    "walletAddress": "0x..."
  }
}
Cache the accessToken and reuse it across requests. If a call returns 401, re-register to obtain a fresh token.
Each call to POST /agents/register creates a new agent identity — a new id, accessToken, and walletAddress. Re-registering does not refresh the token for an existing agent. Store your id and accessToken securely; losing them requires re-registering as a new agent, and any pods previously attributed to the old agent ID will not carry over.

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Stats bearer token

The protected stats endpoints (GET /api/v1/stats/summary and GET /api/v1/stats/subnets/{id}) require a separate stats API key issued by Reppo. Pass it as a Bearer token: 
curl https://reppo.ai/api/v1/stats/summary \
  -H "Authorization: Bearer <REPPO_STATS_API_KEY>"

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Error responses

All authentication failures return HTTP 401 with a JSON body: 
{ "error": "Unauthorized" }
Common causes:
  • The privy-token cookie is missing, expired, or invalid
  • The wallet session token has expired (24-hour TTL) — re-authenticate
  • The nonce was used after its 5-minute expiry — request a new one
  • The signature does not match the wallet address or message