diff --git a/examples/search-and-crawl.ts b/examples/search-and-crawl.ts
index f89ae79..6c51f3d 100644
--- a/examples/search-and-crawl.ts
+++ b/examples/search-and-crawl.ts
@@ -2,27 +2,37 @@ import { OpenAIClient } from '@agentic/openai-fetch'
 import 'dotenv/config'
 import { z } from 'zod'
 
-import { Agentic, SearchAndCrawlTool } from '@/index'
+import { Agentic, SearchAndCrawlTool, WeatherTool } from '@/index'
 
 async function main() {
   const openai = new OpenAIClient({ apiKey: process.env.OPENAI_API_KEY! })
   const agentic = new Agentic({ openai })
 
+  const topic = process.argv[2] || 'OpenAI'
+
   const res = await agentic
-    .gpt4(`Summarize the latest news on {{topic}} using markdown.`)
-    .modelParams({
+    .gpt4({
+      messages: [
+        {
+          role: 'system',
+          content: `You are a MckInsey analyst who is an expert at writing executive summaries. Always respond using markdown unless instructed to respond using JSON.`
+        },
+        {
+          role: 'user',
+          content: `Summarize the latest news on: {{topic}}`
+        }
+      ],
       model: 'gpt-4-32k'
     })
-    .tools([new SearchAndCrawlTool()])
+    .tools([new SearchAndCrawlTool(), new WeatherTool()])
     .input(
       z.object({
         topic: z.string()
       })
     )
-    .call({
-      topic: 'OpenAI'
-    })
+    .call({ topic })
 
+  console.log('\n\n\n')
   console.log(res)
 }
 
diff --git a/src/agentic.ts b/src/agentic.ts
index 1f88a1a..9b448fb 100644
--- a/src/agentic.ts
+++ b/src/agentic.ts
@@ -1,4 +1,5 @@
 import defaultKy from 'ky'
+import { SetOptional } from 'type-fest'
 
 import * as types from './types'
 import { DEFAULT_OPENAI_MODEL } from './constants'
@@ -55,7 +56,7 @@ export class Agentic {
       modelParams: {},
       timeoutMs: 2 * 60000,
       retryConfig: {
-        retries: 3,
+        retries: 2,
         strategy: 'heal',
         ...opts.openaiModelDefaults?.retryConfig
       },
@@ -103,14 +104,17 @@ export class Agentic {
   }
 
   openaiChatCompletion(
-    promptOrChatCompletionParams:
-      | string
-      | Partial<types.openai.ChatCompletionParams> // TODO: make more strict
+    promptOrChatCompletionParams: string | types.openai.ChatCompletionParams, // TODO: make more strict?
+    modelParams?: SetOptional<
+      types.openai.ChatCompletionParams,
+      'model' | 'messages'
+    >
   ) {
     let options: Partial<types.openai.ChatCompletionParams>
 
     if (typeof promptOrChatCompletionParams === 'string') {
       options = {
+        ...modelParams,
         messages: [
           {
             role: 'user',
@@ -119,7 +123,7 @@ export class Agentic {
         ]
       }
     } else {
-      options = promptOrChatCompletionParams
+      options = { ...promptOrChatCompletionParams, ...modelParams }
 
       if (!options.messages) {
         throw new Error('messages must be provided')
@@ -139,12 +143,17 @@ export class Agentic {
   gpt3(
     promptOrChatCompletionParams:
       | string
-      | Omit<types.openai.ChatCompletionParams, 'model'>
+      | SetOptional<types.openai.ChatCompletionParams, 'model'>,
+    modelParams?: SetOptional<
+      types.openai.ChatCompletionParams,
+      'model' | 'messages'
+    >
   ) {
-    let options: Omit<types.openai.ChatCompletionParams, 'model'>
+    let options: SetOptional<types.openai.ChatCompletionParams, 'model'>
 
     if (typeof promptOrChatCompletionParams === 'string') {
       options = {
+        ...modelParams,
         messages: [
           {
             role: 'user',
@@ -153,7 +162,7 @@ export class Agentic {
         ]
       }
     } else {
-      options = promptOrChatCompletionParams
+      options = { ...promptOrChatCompletionParams, ...modelParams }
 
       if (!options.messages) {
         throw new Error('messages must be provided')
@@ -174,12 +183,17 @@ export class Agentic {
   gpt4(
     promptOrChatCompletionParams:
       | string
-      | Omit<types.openai.ChatCompletionParams, 'model'>
+      | SetOptional<types.openai.ChatCompletionParams, 'model'>,
+    modelParams?: SetOptional<
+      types.openai.ChatCompletionParams,
+      'model' | 'messages'
+    >
   ) {
-    let options: Omit<types.openai.ChatCompletionParams, 'model'>
+    let options: SetOptional<types.openai.ChatCompletionParams, 'model'>
 
     if (typeof promptOrChatCompletionParams === 'string') {
       options = {
+        ...modelParams,
         messages: [
           {
             role: 'user',
@@ -188,7 +202,7 @@ export class Agentic {
         ]
       }
     } else {
-      options = promptOrChatCompletionParams
+      options = { ...promptOrChatCompletionParams, ...modelParams }
 
       if (!options.messages) {
         throw new Error('messages must be provided')
diff --git a/src/services/diffbot.ts b/src/services/diffbot.ts
index c8fdb5e..0473680 100644
--- a/src/services/diffbot.ts
+++ b/src/services/diffbot.ts
@@ -1,4 +1,5 @@
 import defaultKy from 'ky'
+import { AbortError } from 'p-retry'
 import pThrottle from 'p-throttle'
 import { P } from 'pino'
 
@@ -337,7 +338,7 @@ export class DiffbotClient {
     apiKey = process.env.DIFFBOT_API_KEY,
     apiBaseUrl = DIFFBOT_API_BASE_URL,
     apiKnowledgeGraphBaseUrl = DIFFBOT_KNOWLEDGE_GRAPH_API_BASE_URL,
-    timeoutMs = 60_000,
+    timeoutMs = 30_000,
     ky = defaultKy
   }: {
     apiKey?: string
@@ -388,13 +389,24 @@ export class DiffbotClient {
       }
     }
 
-    console.log(`DiffbotClient._extract: ${endpoint}`, searchParams)
+    // TODO
+    const { url } = searchParams
+    if (url) {
+      const parsedUrl = new URL(url)
+      if (parsedUrl.hostname.includes('theguardian.com')) {
+        throw new AbortError(
+          `Diffbot does not support URLs from domain "${parsedUrl.hostname}"`
+        )
+      }
+    }
+
+    // console.log(`DiffbotClient._extract: ${endpoint}`, searchParams)
 
     return this.api
       .get(endpoint, {
         searchParams,
         headers,
-        retry: 2
+        retry: 1
       })
       .json<T>()
   }
diff --git a/test/services/diffbot.test.ts b/test/services/diffbot.test.ts
index 09308d3..00686d9 100644
--- a/test/services/diffbot.test.ts
+++ b/test/services/diffbot.test.ts
@@ -4,7 +4,7 @@ import { DiffbotClient } from '@/services'
 
 import { isCI, ky } from '../_utils'
 
-test('Diffbot.extractAnalyze', async (t) => {
+test('Diffbot.extractAnalyze - transitivebullsh.it', async (t) => {
   if (!process.env.DIFFBOT_API_KEY || isCI) {
     return t.pass()
   }
@@ -20,6 +20,23 @@ test('Diffbot.extractAnalyze', async (t) => {
   t.is(result.objects?.length, 1)
 })
 
+// TODO
+// test.only('Diffbot.extractAnalyze - theguardian.com/world/ukraine', async (t) => {
+//   if (!process.env.DIFFBOT_API_KEY || isCI) {
+//     return t.pass()
+//   }
+
+//   t.timeout(2 * 60 * 1000)
+//   const client = new DiffbotClient({ ky })
+
+//   const result = await client.extractAnalyze({
+//     url: 'https://www.theguardian.com/world/ukraine'
+//   })
+//   console.log(JSON.stringify(result, null, 2))
+//   t.is(result.type, 'list')
+//   t.is(result.objects?.length, 1)
+// })
+
 test('Diffbot.extractArticle', async (t) => {
   if (!process.env.DIFFBOT_API_KEY || isCI) {
     return t.pass()