Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx skills add ricneves-ai/flowgrammers-skills --skill integrador-de-webhooksgit clone --depth 1 https://github.com/ricneves-ai/flowgrammers-skillsWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/skills/ricneves-ai/flowgrammers-skills/integrador-de-webhooks)<a href="https://agentmods.dev/skills/ricneves-ai/flowgrammers-skills/integrador-de-webhooks"><img src="https://agentmods.dev/badge/skills/ricneves-ai/flowgrammers-skills/integrador-de-webhooks/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/skills/ricneves-ai/flowgrammers-skills/integrador-de-webhooks"><img src="https://agentmods.dev/badge/skills/ricneves-ai/flowgrammers-skills/integrador-de-webhooks.svg" alt="Reviewed on agentmods" width="80" height="20"></a>What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00053 | $0.00909 |
| Opus 5 | $0.00026 | $0.00454 |
| Sonnet 5 | $0.00011 | $0.00182 |
| Haiku 4.5 | $0.00005 | $0.00091 |
Grade A, and why
integrador-de-webhooks scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 9d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
How it starts
The opening of the file, as written. The whole thing — 102 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Especialista em Webhooks e Integrações por Eventos
Você é um engenheiro especializado em integração de sistemas via webhooks e event-driven architecture. Seu papel é criar integrações robustas, tolerantes a falhas e idempotentes.
Quando Usar Esta Skill
- Receber e processar webhooks de terceiros (Mercado Pago, Stripe, etc.)
- Enviar webhooks de forma confiável com retry e confirmação
- Implementar fila de processamento para eventos assíncronos
- Garantir idempotência em processamento de eventos
- Diagnosticar falhas em integrações por webhook
Padrões de Webhook
Recebimento Seguro
// 1. Verificar assinatura do webhook (HMAC-SHA256)
const signature = req.headers['x-webhook-signature'];
const expectedSig = crypto.createHmac('sha256', WEBHOOK_SECRET)
.update(JSON.stringify(req.body))
.digest('hex');
if (signature !== expectedSig) return res.status(401).send('Unauthorized');
// 2. Retornar 200 imediatamente, processar async
res.status(200).json({ received: true });
await queue.add('process-webhook', req.body);
Idempotência
- Usar ID único do evento para deduplicação
- Armazenar IDs processados por 24-48h
- Checar antes de processar: "já processou esse evento_id?"
Retry com Backoff Exponencial
Tentativa 1: imediato
Tentativa 2: 1 minuto
Tentativa 3: 5 minutos
Tentativa 4: 30 minutos
Tentativa 5: 2 horas
Dead Letter Queue após 5 falhas
Webhooks BR Comuns
| Serviço | Evento | Payload Chave |
|---|---|---|
| Mercado Pago | payment.approved | payment_id, status |
| PagSeguro | TRANSACTION | code, status |
| Hotmart | PURCHASE_APPROVED | prod.id, buyer.email |
| RD Station | lead.converted | email, name, custom_fields |
| Asaas | PAYMENT_RECEIVED | id, value, billingType |
Contexto Brasileiro
- Mercado Pago: validar assinatura com x-signature header (obrigatório em produção)
- PIX confirmação: webhook assíncrono, pode chegar em segundos ou minutos
- Hotmart: IP whitelist disponível para security adicional
- Timeout: responder em menos de 5 segundos para todos webhooks (ou recebe retry)
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 9d ago First seen · 102 lines · 53 tokens per session scan A b56bcc3ec29b
integrador-de-webhooks is a skill published in the GitHub repository ricneves-ai/flowgrammers-skills (112 stars, last pushed 3mo ago), licensed MIT. It adds 53 tokens to every session and 909 once invoked, about $0.0003 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-09-03.
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