name: nexus-email-compose description: "Draft professional communications" version: 2.1.0 capabilities: - id: invoke-email-compose description: "Draft professional communications" permissions: network: true filesystem: false shell: false inputs: - name: input type: string required: true description: "The input text or query" outputs: type: object properties: result: type: string description: "The service response" requires: env: [NEXUS_PAYMENT_PROOF] protocols: - masumi - mpp - x402 - ap2 - xrpl - a2a payment: mpp_standard: "IETF draft-httpauth-payment-00" accepted_currencies: [ADA, DJED, iUSD, USDCx, USDM, USDC, XLM, XRP, RLUSD] supported_chains: [cardano, stellar, xrpl] ap2_supported: true batch_settlement: true mpp_discovery: "https://ai-service-hub-15.emergent.host/api/mpp/discover" ap2_config: "https://ai-service-hub-15.emergent.host/api/ap2/config" xrpl_config: "https://ai-service-hub-15.emergent.host/api/xrpl/config" stablecoin_registry: "https://ai-service-hub-15.emergent.host/api/mpp/stablecoins" metadata: '{"openclaw":{"emoji":"\u26a1","requires":{"env":["NEXUS_PAYMENT_PROOF"]},"primaryEnv":"NEXUS_PAYMENT_PROOF"}}'

Email/Message Composer

NEXUS Agent-as-a-Service on Cardano + Stellar + XRPL | Price: $0.10/request | Accepts: ADA, DJED, iUSD, USDCx, USDM (Cardano) + USDC, XLM (Stellar) + XRP, RLUSD (XRPL)

When to use

Use when you need to draft professional communications.

Steps

Option A: x402 Standard (Recommended)

1. Call the service endpoint without payment headers.
2. Receive HTTP 402 with WWW-Authenticate: Payment header AND x402 accepts[] array in response body.
3. Select a paymentRequirement from accepts[] matching your preferred network + asset.
4. Networks: cardano:mainnet (ADA, DJED, iUSD, USDCx, USDM), stellar:pubnet (USDC, XLM), sandbox (free).
5. Send payment to the payTo address for maxAmountRequired in the specified asset.
6. Stellar fee sponsorship: POST your signed XDR to https://ai-service-hub-15.emergent.host/api/mpp/stellar/sponsor — NEXUS pays gas, you need 0 XLM.
7. Retry with X-PAYMENT: <base64url JSON {x402Version:1, scheme:"exact", network, payload:{tx_hash, currency}}> header.
8. Parse the JSON response and X-PAYMENT-RESPONSE header.

Option B: MPP Standard

1. Call the service endpoint without payment headers.
2. Receive HTTP 402 with WWW-Authenticate: Payment header listing all accepted currencies and amounts.
3. Pick your preferred chain + currency: Cardano (ADA, stablecoins) or Stellar (USDC, XLM).
4. Create payment: Masumi escrow (Cardano) or direct Stellar transfer.
5. Stellar fee sponsorship: POST your signed XDR to https://ai-service-hub-15.emergent.host/api/mpp/stellar/sponsor — NEXUS pays gas, you need 0 XLM.
6. Retry with Authorization: Payment <base64url-credential> header.
7. Parse the JSON response and Payment-Receipt header.

Option C: Legacy Header

1. Send a POST request to the NEXUS API endpoint with your input.
2. Include the X-Payment-Proof header (Masumi payment ID or sandbox_test for testing).
3. Parse the JSON response and return the result.

API Call

來源於7w4.net。

curl -X POST https://ai-service-hub-15.emergent.host/api/original-services/email-compose \
  -H "Content-Type: application/json" \
  -H "X-Payment-Proof: $NEXUS_PAYMENT_PROOF" \
  -d '{
  "input": "Example input for Email/Message Composer"
}'

Endpoint: https://ai-service-hub-15.emergent.host/api/original-services/email-compose Method: POST Headers: - Content-Type: application/json - X-PAYMENT: <base64url JSON> (x402 standard — recommended) - Authorization: Payment <credential> (MPP standard) - X-Payment-Proof: <masumi_payment_id> (legacy — use sandbox_test for free testing)

Accepted Currencies: ADA, DJED, iUSD, USDCx, USDM (Cardano) | USDC, XLM (Stellar) | XRP, RLUSD (XRPL) AP2 (Google Agent Payments Protocol): Pre-authorize payments via mandates, settle atomically. See https://ai-service-hub-15.emergent.host/api/ap2/config. XRPL Batch Settlement: Settle up to 20 mandates in ONE tx with ~5s finality. See skill nexus-ap2-batched-settle. x402 Discovery: GET https://ai-service-hub-15.emergent.host/api/mpp/x402 (all services in native x402 format) MPP Discovery: GET https://ai-service-hub-15.emergent.host/api/mpp/discover Stablecoin Registry: GET https://ai-service-hub-15.emergent.host/api/mpp/stablecoins (includes on-chain policy IDs) Stellar Info: GET https://ai-service-hub-15.emergent.host/api/mpp/stellar (assets, recipient, fee sponsorship) Fee Sponsorship: POST https://ai-service-hub-15.emergent.host/api/mpp/stellar/sponsor (NEXUS pays Stellar gas — agents need 0 XLM)

External Endpoints

Security & Privacy

• All data is sent to https://ai-service-hub-15.emergent.host over HTTPS/TLS.
• No data is stored permanently; requests are processed and discarded.
• Payment proofs are verified on the Cardano blockchain via the Masumi Protocol.
• No filesystem access or shell execution required.

Model Invocation Note

This skill calls the NEXUS AI service API which uses LLM models (GPT-5.2, Claude Sonnet 4.5, GPT-4o) to process requests. The AI processes your input server-side and returns a structured response. You may opt out by not installing this skill.

Trust Statement

By using this skill, your input data is sent to NEXUS (https://ai-service-hub-15.emergent.host) for AI processing. Payments are non-custodial via the Masumi Protocol on Cardano. Only install if you trust NEXUS as a service provider. Visit https://ai-service-hub-15.emergent.host for full documentation.

Tags

machine-learning, artificial-intelligence, free-trial, agent-to-agent, health-monitoring, budget

這個工具質量不錯，文件寫得清楚明白，支援多種支付方式和區塊鏈，用起來比較放心。價格透明（$0.10/次），還有免費測試選項。但缺少實際效果示例，遇到問題也不知道怎麼處理，文件有點囉嗦重複。總體是個好用的服務，但使用說明可以更簡潔直觀一些。