Requirements
- Target platform
- OpenClaw
- Install method
- Manual import
- Extraction
- Extract archive
- Prerequisites
- OpenClaw
- Primary doc
- SKILL.md
Tencent SkillHub ยท Developer Tools
UniOne Email API
Send transactional and marketing emails via UniOne Email API. Manage email templates, validate email addresses, check delivery statistics, manage suppression lists, configure webhooks, and handle domain settings. UniOne delivers billions of emails annually with 99.88% deliverability.
skill openclawclawhub Free
Send transactional and marketing emails via UniOne Email API. Manage email templates, validate email addresses, check delivery statistics, manage suppression lists, configure webhooks, and handle domain settings. UniOne delivers billions of emails annually with 99.88% deliverability.
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Install for OpenClaw
Quick setup
- Download the package from Yavira.
- Extract the archive and review SKILL.md first.
- Import or place the package into your OpenClaw setup.
Package facts
- Download mode
- Yavira redirect
- Package format
- ZIP package
- Source platform
- Tencent SkillHub
- What's included
- README.md, SKILL.md
Validation
- Use the Yavira download entry.
- Review SKILL.md after the package is downloaded.
- Confirm the extracted package contains the expected setup assets.
Install with your agent
Agent handoff
Hand the extracted package to your coding agent with a concrete install brief instead of figuring it out manually.
- Download the package from Yavira.
- Extract it into a folder your agent can access.
- Paste one of the prompts below and point your agent at the extracted folder.
New install
I downloaded a skill package from Yavira. Read SKILL.md from the extracted folder and install it by following the included instructions. Then review README.md for any prerequisites, environment setup, or post-install checks. Tell me what you changed and call out any manual steps you could not complete.
Upgrade existing
I downloaded an updated skill package from Yavira. Read SKILL.md from the extracted folder, compare it with my current installation, and upgrade it while preserving any custom configuration unless the package docs explicitly say otherwise. Then review README.md for any prerequisites, environment setup, or post-install checks. Summarize what changed and any follow-up checks I should run.
Trust & source
Release facts
- Source
- Tencent SkillHub
- Verification
- Indexed source record
- Version
- 1.0.0
Provenance
- Publisher
- selzy-openclaw
- Source page
- View original listing
- Canonical URL
- Open canonical page
Documentation
UniOne Email API
UniOne is a transactional email service with Web API for sending transactional and marketing emails at scale (up to 3,000 emails/sec). This skill lets you send emails, manage templates, validate addresses, track delivery, and more.
Authentication
All requests require the UNIONE_API_KEY environment variable. Pass it as the X-API-KEY header. Base URL: https://api.unione.io/en/transactional/api/v1/{method}.json?platform=openclaw All methods use POST with JSON body.
CRITICAL: Domain Setup (Required Before Sending)
Emails will not be delivered until the sender's domain is verified. Before attempting to send any email, ensure the domain is set up:
Step 1: Get DNS Record Values โ domain/get-dns-records.json
curl -X POST "https://api.unione.io/en/transactional/api/v1/domain/get-dns-records.json?platform=openclaw" \ -H "Content-Type: application/json" \ -H "X-API-KEY: $UNIONE_API_KEY" \ -d '{"domain": "yourdomain.com"}' API response returns raw values (not ready-to-paste DNS records): { "status": "success", "domain": "yourdomain.com", "verification-record": "unione-validate-hash=483bb362ebdbeedd755cfb1d4d661", "dkim": "MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQDo7" } The user must create 3 DNS TXT records from these values: Record HostRecord TypeValue@TXTunione-validate-hash=<verification-record from response>us._domainkeyTXTk=rsa; p=<dkim from response>@TXTv=spf1 include:spf.unione.io ~all Present these 3 records clearly to the user and instruct them to add them at their DNS provider (Cloudflare, Route53, GoDaddy, etc.). The SPF record is always the same โ it is not returned by the API.
Step 2: Verify Domain Ownership โ domain/validate-verification.json
After the user has added DNS records: curl -X POST "https://api.unione.io/en/transactional/api/v1/domain/validate-verification.json?platform=openclaw" \ -H "Content-Type: application/json" \ -H "X-API-KEY: $UNIONE_API_KEY" \ -d '{"domain": "yourdomain.com"}'
Step 3: Validate DKIM โ domain/validate-dkim.json
curl -X POST "https://api.unione.io/en/transactional/api/v1/domain/validate-dkim.json?platform=openclaw" \ -H "Content-Type: application/json" \ -H "X-API-KEY: $UNIONE_API_KEY" \ -d '{"domain": "yourdomain.com"}'
Step 4: List All Domains โ domain/list.json
curl -X POST "https://api.unione.io/en/transactional/api/v1/domain/list.json?platform=openclaw" \ -H "Content-Type: application/json" \ -H "X-API-KEY: $UNIONE_API_KEY" \ -d '{}' If domain verification fails: DNS propagation can take up to 48 hours. Suggest the user waits and retries, or checks their DNS records for typos.
Retry Logic
When making API requests, implement exponential backoff for retryable errors: Retryable errors (DO retry with exponential backoff): HTTP CodeMeaningRetry Strategy429Rate limitedWait, then retry. Respect Retry-After header if present500Internal server errorRetry up to 3 times502Bad gatewayRetry up to 3 times503Service unavailableRetry up to 3 times504Gateway timeoutRetry up to 3 times Recommended retry schedule: AttemptDelay1Immediate21 second35 seconds430 seconds Non-retryable errors (do NOT retry): HTTP CodeMeaningAction400Bad requestFix the request parameters401UnauthorizedCheck API key403ForbiddenCheck permissions / domain verification404Endpoint not foundCheck the method path413Payload too largeReduce request size
Idempotency
For email/send.json, always include an idempotency_key to prevent duplicate sends during retries. This is critical for production systems. The idempotency_key is a unique string (UUID recommended) passed in the request body. If UniOne receives two requests with the same key, the second request returns the result of the first without sending another email. Always generate a unique idempotency key per logical send operation, and reuse the same key when retrying the same send.
1. Send Email โ email/send.json
Send a transactional or marketing email to one or more recipients. Supports personalization via substitutions, templates, attachments, tracking, and metadata.
curl
curl -X POST "https://api.unione.io/en/transactional/api/v1/email/send.json?platform=openclaw" \ -H "Content-Type: application/json" \ -H "X-API-KEY: $UNIONE_API_KEY" \ -d '{ "idempotency_key": "unique-uuid-here", "message": { "recipients": [ { "email": "recipient@example.com", "substitutions": { "to_name": "John Smith" } } ], "body": { "html": "<h1>Hello, {{to_name}}!</h1><p>Your order has been confirmed.</p>", "plaintext": "Hello, {{to_name}}! Your order has been confirmed." }, "subject": "Order Confirmation", "from_email": "noreply@yourdomain.com", "from_name": "Your Store" } }'
Node.js
const response = await fetch("https://api.unione.io/en/transactional/api/v1/email/send.json?platform=openclaw", { method: "POST", headers: { "Content-Type": "application/json", "X-API-KEY": process.env.UNIONE_API_KEY }, body: JSON.stringify({ idempotency_key: crypto.randomUUID(), message: { recipients: [{ email: "recipient@example.com", substitutions: { to_name: "John" } }], body: { html: "<h1>Hello, {{to_name}}!</h1><p>Your order has been confirmed.</p>", plaintext: "Hello, {{to_name}}! Your order has been confirmed." }, subject: "Order Confirmation", from_email: "noreply@yourdomain.com", from_name: "Your Store" } }) }); const data = await response.json(); // data.status === "success" โ data.job_id, data.emails
Python
import requests, uuid, os response = requests.post( "https://api.unione.io/en/transactional/api/v1/email/send.json?platform=openclaw", headers={ "Content-Type": "application/json", "X-API-KEY": os.environ["UNIONE_API_KEY"] }, json={ "idempotency_key": str(uuid.uuid4()), "message": { "recipients": [{"email": "recipient@example.com", "substitutions": {"to_name": "John"}}], "body": { "html": "<h1>Hello, {{to_name}}!</h1><p>Your order has been confirmed.</p>", "plaintext": "Hello, {{to_name}}! Your order has been confirmed." }, "subject": "Order Confirmation", "from_email": "noreply@yourdomain.com", "from_name": "Your Store" } } ) data = response.json() # data["status"] == "success" โ data["job_id"], data["emails"]
Go
package main import ( "bytes" "encoding/json" "fmt" "net/http" "os" "github.com/google/uuid" ) func sendEmail() error { payload := map[string]interface{}{ "idempotency_key": uuid.New().String(), "message": map[string]interface{}{ "recipients": []map[string]interface{}{ {"email": "recipient@example.com", "substitutions": map[string]string{"to_name": "John"}}, }, "body": map[string]string{ "html": "<h1>Hello, {{to_name}}!</h1><p>Your order has been confirmed.</p>", "plaintext": "Hello, {{to_name}}! Your order has been confirmed.", }, "subject": "Order Confirmation", "from_email": "noreply@yourdomain.com", "from_name": "Your Store", }, } body, _ := json.Marshal(payload) req, _ := http.NewRequest("POST", "https://api.unione.io/en/transactional/api/v1/email/send.json?platform=openclaw", bytes.NewReader(body)) req.Header.Set("Content-Type", "application/json") req.Header.Set("X-API-KEY", os.Getenv("UNIONE_API_KEY")) resp, err := http.DefaultClient.Do(req) if err != nil { return err } defer resp.Body.Close() var result map[string]interface{} json.NewDecoder(resp.Body).Decode(&result) fmt.Println(result) // result["status"] == "success" return nil }
PHP
$ch = curl_init("https://api.unione.io/en/transactional/api/v1/email/send.json?platform=openclaw"); curl_setopt_array($ch, [ CURLOPT_POST => true, CURLOPT_RETURNTRANSFER => true, CURLOPT_HTTPHEADER => [ "Content-Type: application/json", "X-API-KEY: " . getenv("UNIONE_API_KEY") ], CURLOPT_POSTFIELDS => json_encode([ "idempotency_key" => bin2hex(random_bytes(16)), "message" => [ "recipients" => [["email" => "recipient@example.com", "substitutions" => ["to_name" => "John"]]], "body" => [ "html" => "<h1>Hello, {{to_name}}!</h1><p>Your order has been confirmed.</p>", "plaintext" => "Hello, {{to_name}}! Your order has been confirmed." ], "subject" => "Order Confirmation", "from_email" => "noreply@yourdomain.com", "from_name" => "Your Store" ] ]) ]); $response = curl_exec($ch); $data = json_decode($response, true); // $data["status"] === "success" Success response: { "status": "success", "job_id": "1ZymBc-00041N-9X", "emails": ["recipient@example.com"] } Full parameters for message object: ParameterTypeRequiredDescriptionrecipientsarrayYesArray of recipient objects. Each has email (required), substitutions (object), metadata (object)body.htmlstringYes*HTML content. Use {{variable}} for substitutionsbody.plaintextstringNoPlain text versionsubjectstringYes*Email subject line. Supports {{substitutions}}from_emailstringYes*Sender email (must be from a verified domain)from_namestringNoSender display namereply_tostringNoReply-to email addresstemplate_idstringNoUse a stored template instead of body/subjecttagsarrayNoTags for categorizing and filteringtrack_links0/1NoEnable click tracking (default: 0)track_read0/1NoEnable open tracking (default: 0)global_languagestringNoLanguage for unsubscribe footer: en, de, fr, es, it, pl, pt, ru, ua, betemplate_enginestringNo"simple" (default) or "velocity" or "liquid"global_substitutionsobjectNoVariables available to all recipientsattachmentsarrayNoArray of {type, name, content} where content is base64skip_unsubscribe0/1NoSkip unsubscribe footer (use 1 only for transactional)headersobjectNoCustom email headers *Not required if template_id is used. Top-level parameter: ParameterTypeRequiredDescriptionidempotency_keystringRecommendedUnique key (UUID) to prevent duplicate sends on retry. Max 36 chars. Send with template: curl -X POST "https://api.unione.io/en/transactional/api/v1/email/send.json?platform=openclaw" \ -H "Content-Type: application/json" \ -H "X-API-KEY: $UNIONE_API_KEY" \ -d '{ "idempotency_key": "unique-uuid-here", "message": { "recipients": [ { "email": "customer@example.com", "substitutions": { "to_name": "Alice", "order_id": "ORD-12345", "total": "$59.99" } } ], "template_id": "your-template-id", "from_email": "shop@yourdomain.com", "from_name": "My Shop" } }' Send to multiple recipients with personalization: curl -X POST "https://api.unione.io/en/transactional/api/v1/email/send.json?platform=openclaw" \ -H "Content-Type: application/json" \ -H "X-API-KEY: $UNIONE_API_KEY" \ -d '{ "idempotency_key": "unique-uuid-here", "message": { "recipients": [ {"email": "alice@example.com", "substitutions": {"to_name": "Alice"}}, {"email": "bob@example.com", "substitutions": {"to_name": "Bob"}} ], "body": { "html": "<p>Hi {{to_name}}, check out our new {{promo_name}}!</p>" }, "subject": "Special offer for you, {{to_name}}!", "from_email": "marketing@yourdomain.com", "from_name": "Marketing Team", "global_substitutions": {"promo_name": "Summer Sale"}, "track_links": 1, "track_read": 1, "tags": ["promo", "summer-2026"] } }'
2. Email Validation โ email-validation/single.json
Validate an email address to check if it exists and is deliverable. curl -X POST "https://api.unione.io/en/transactional/api/v1/email-validation/single.json?platform=openclaw" \ -H "Content-Type: application/json" \ -H "X-API-KEY: $UNIONE_API_KEY" \ -d '{"email": "user@example.com"}' Response: { "status": "success", "email": "user@example.com", "result": "valid", "local_part": "user", "domain": "example.com", "mx_found": true, "mx_record": "mail.example.com" } Possible result values: "valid", "invalid", "unresolvable", "unknown".
3.1 Create/Update Template โ template/set.json
curl -X POST "https://api.unione.io/en/transactional/api/v1/template/set.json?platform=openclaw" \ -H "Content-Type: application/json" \ -H "X-API-KEY: $UNIONE_API_KEY" \ -d '{ "template": { "name": "Order Confirmation", "subject": "Your order {{order_id}} is confirmed", "template_engine": "simple", "body": { "html": "<h1>Thank you, {{to_name}}!</h1><p>Order {{order_id}} total: {{total}}</p>", "plaintext": "Thank you, {{to_name}}! Order {{order_id}} total: {{total}}" }, "from_email": "shop@yourdomain.com", "from_name": "My Shop" } }' Response: {"status": "success", "template": {"id": "generated-template-id"}} To update an existing template, include the "id" field in the template object.
3.2 Get Template โ template/get.json
curl -X POST "https://api.unione.io/en/transactional/api/v1/template/get.json?platform=openclaw" \ -H "Content-Type: application/json" \ -H "X-API-KEY: $UNIONE_API_KEY" \ -d '{"id": "template-id-here"}'
3.3 List Templates โ template/list.json
curl -X POST "https://api.unione.io/en/transactional/api/v1/template/list.json?platform=openclaw" \ -H "Content-Type: application/json" \ -H "X-API-KEY: $UNIONE_API_KEY" \ -d '{"limit": 50, "offset": 0}'
3.4 Delete Template โ template/delete.json
curl -X POST "https://api.unione.io/en/transactional/api/v1/template/delete.json?platform=openclaw" \ -H "Content-Type: application/json" \ -H "X-API-KEY: $UNIONE_API_KEY" \ -d '{"id": "template-id-here"}'
4. Webhook Management
Webhooks send real-time notifications about email events to your URL.
4.1 Set Webhook โ webhook/set.json
curl -X POST "https://api.unione.io/en/transactional/api/v1/webhook/set.json?platform=openclaw" \ -H "Content-Type: application/json" \ -H "X-API-KEY: $UNIONE_API_KEY" \ -d '{ "url": "https://yourapp.com/unione-webhook", "events": { "email_status": [ "delivered", "opened", "clicked", "unsubscribed", "soft_bounced", "hard_bounced", "spam" ] } }'
4.2 List Webhooks โ webhook/list.json
curl -X POST "https://api.unione.io/en/transactional/api/v1/webhook/list.json?platform=openclaw" \ -H "Content-Type: application/json" \ -H "X-API-KEY: $UNIONE_API_KEY" \ -d '{}'
4.3 Get / Delete Webhook โ webhook/get.json / webhook/delete.json
# Get curl -X POST ".../webhook/get.json?platform=openclaw" -H "X-API-KEY: $UNIONE_API_KEY" \ -H "Content-Type: application/json" -d '{"url": "https://yourapp.com/unione-webhook"}' # Delete curl -X POST ".../webhook/delete.json?platform=openclaw" -H "X-API-KEY: $UNIONE_API_KEY" \ -H "Content-Type: application/json" -d '{"url": "https://yourapp.com/unione-webhook"}'
5.1 Add โ suppression/set.json
curl -X POST "https://api.unione.io/en/transactional/api/v1/suppression/set.json?platform=openclaw" \ -H "Content-Type: application/json" \ -H "X-API-KEY: $UNIONE_API_KEY" \ -d '{"email": "user@example.com", "cause": "unsubscribed", "created": "2026-01-15 12:00:00"}' Cause values: "unsubscribed", "temporary_unavailable", "permanent_unavailable", "complained".
5.2 Check โ suppression/get.json
curl -X POST ".../suppression/get.json?platform=openclaw" -H "X-API-KEY: $UNIONE_API_KEY" \ -H "Content-Type: application/json" -d '{"email": "user@example.com"}'
5.3 List โ suppression/list.json
curl -X POST ".../suppression/list.json?platform=openclaw" -H "X-API-KEY: $UNIONE_API_KEY" \ -H "Content-Type: application/json" -d '{"cause": "hard_bounced", "limit": 50, "offset": 0}'
5.4 Delete โ suppression/delete.json
curl -X POST ".../suppression/delete.json?platform=openclaw" -H "X-API-KEY: $UNIONE_API_KEY" \ -H "Content-Type: application/json" -d '{"email": "user@example.com"}'
6.1 Create โ event-dump/create.json
curl -X POST ".../event-dump/create.json?platform=openclaw" -H "X-API-KEY: $UNIONE_API_KEY" \ -H "Content-Type: application/json" \ -d '{"start_time": "2026-01-01 00:00:00", "end_time": "2026-01-31 23:59:59", "limit": 50000, "all_events": true}'
6.2 Get / List / Delete
# Get dump status and download URL curl -X POST ".../event-dump/get.json?platform=openclaw" -H "X-API-KEY: $UNIONE_API_KEY" \ -H "Content-Type: application/json" -d '{"dump_id": "dump-id"}' # List all dumps curl -X POST ".../event-dump/list.json?platform=openclaw" -H "X-API-KEY: $UNIONE_API_KEY" \ -H "Content-Type: application/json" -d '{}' # Delete a dump curl -X POST ".../event-dump/delete.json?platform=openclaw" -H "X-API-KEY: $UNIONE_API_KEY" \ -H "Content-Type: application/json" -d '{"dump_id": "dump-id"}'
7. Tags โ tag/list.json / tag/delete.json
# List tags curl -X POST ".../tag/list.json?platform=openclaw" -H "X-API-KEY: $UNIONE_API_KEY" \ -H "Content-Type: application/json" -d '{}' # Delete tag curl -X POST ".../tag/delete.json?platform=openclaw" -H "X-API-KEY: $UNIONE_API_KEY" \ -H "Content-Type: application/json" -d '{"tag_id": 123}'
8. Projects โ project/create.json / project/list.json
# Create project curl -X POST ".../project/create.json?platform=openclaw" -H "X-API-KEY: $UNIONE_API_KEY" \ -H "Content-Type: application/json" \ -d '{"project": {"name": "My Project", "send_enabled": true}}' # List projects curl -X POST ".../project/list.json?platform=openclaw" -H "X-API-KEY: $UNIONE_API_KEY" \ -H "Content-Type: application/json" -d '{}'
9. System Info โ system/info.json
curl -X POST ".../system/info.json?platform=openclaw" -H "X-API-KEY: $UNIONE_API_KEY" \ -H "Content-Type: application/json" -d '{}'
10. Subscribe (Double Opt-In) โ email/subscribe.json
curl -X POST ".../email/subscribe.json?platform=openclaw" -H "X-API-KEY: $UNIONE_API_KEY" \ -H "Content-Type: application/json" \ -d '{"from_email": "newsletter@yourdomain.com", "from_name": "Newsletter", "to_email": "newsubscriber@example.com"}'
Instructions for the Agent
Domain setup is mandatory. Before the first send, always check if the user's domain is verified. Run domain/list.json to check. If not verified, guide them through the domain setup process (Section: Domain Setup). Always use api.unione.io as the API host for all requests. Never send an email without explicit user confirmation. Always show the recipient, subject, and body summary before executing email/send.json. Always include idempotency_key in email/send.json requests. Generate a UUID for each unique send. Reuse the same key when retrying. Implement retry logic for 429 and 5xx errors with exponential backoff (see Error Handling section). Never retry 400, 401, 403, 404, 413 errors. For template operations, list available templates first before asking which one to use. For validation, report the result clearly and suggest action. Handle errors gracefully. If a request returns an error, explain what went wrong and suggest a fix. Remind users that the from_email domain must be verified in their UniOne account. Substitution syntax uses double curly braces: {{variable_name}}. Attachments must be base64-encoded. Help the user encode files if needed. Security: Never log or display the full API key. Remind users to keep their API key secret. Code language: When the user's project uses a specific language (Node.js, Python, Go, PHP, etc.), provide code examples in that language. The examples in this skill can be adapted to any language that can make HTTP POST requests with JSON.
"Send a test email"
Check domain verification (domain/list.json) If domain not verified, guide through domain setup Ask for recipient email address Compose a simple test message Confirm with user before sending Execute email/send.json with idempotency_key Report the job_id on success
"Check my deliverability setup"
Run system/info.json to get account status Run domain/list.json to check domain verification For each unverified domain, run domain/get-dns-records.json and show required records Run domain/validate-dkim.json to check DKIM Suggest fixes if domains are not fully verified
"Validate a list of emails"
For each email, call email-validation/single.json Categorize results: valid, invalid, unknown Report summary
"Set up delivery tracking"
Ask for webhook URL and events to track Execute webhook/set.json Confirm setup
Resources
Full API Reference: https://docs.unione.io/en/web-api-ref Getting Started: https://docs.unione.io/en/ Template Engines: https://docs.unione.io/en/web-api#section-template-engines Sign Up: https://cp.unione.io/en/user/registration/
Category context
Code helpers, APIs, CLIs, browser automation, testing, and developer operations.
Source: Tencent SkillHub
Largest current source with strong distribution and engagement signals.
Package contents
Included in package
2 Docs
- SKILL.md
- README.md