Morph Provider Guide

Morph is a Tier-2 catalog provider: OpenAI-wire-compatible with one documented quirk, so its entire integration is one JSON file (src/lib/providers/catalog/morph.json) rather than hand-written code. That file is the source of truth for everything on this page.

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Key Facts

• Provider id: morph (alias: morphllm)
• Protocol: OpenAI-compatible (/chat/completions)
• Base URL: https://api.morphllm.com/v1
• Default model: morph-v3-large
• Models in catalog: 2
• Streaming: supported
• Tool calling: not supported — Morph's catalog entry declares tools: false. morph-v3-large echoes a literal <tool_call>... block as plain text instead of a structured tool call, and morph-v3-fast ignores the tools parameter entirely.
• Structured output: supported (response_format: json_object/schema)
• Embeddings: not supported
• Quirk — messageContentFormat: "string": Morph rejects the OpenAI content-parts array format (and the null content OpenAI sends on an assistant message with tool calls) with HTTP 500. NeuroLink's ConfiguredOpenAICompatProvider normalizes every message to a plain string before sending, so this should not surface as an error in normal use.
• Billing: free-with-card — a payment method must be on file; until one is added, calls are rate-limited to 5 requests/minute
• Key format: none declared

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Quick Start

1. Get an API key

1. Visit: https://morphllm.com/dashboard and sign in
2. Add a payment method (required to lift the 5 req/min limit)
3. Generate an API key from the dashboard
4. Set MORPH_API_KEY in your .env file

2. Configure

export MORPH_API_KEY=your-api-key
export MORPH_MODEL=morph-v3-large      # optional — overrides the default model
export MORPH_BASE_URL=https://api.morphllm.com/v1   # optional — self-hosted or proxy

3. Use it

import { NeuroLink } from "@juspay/neurolink";

const neurolink = new NeuroLink();

const result = await neurolink.generate({
  input: { text: "Summarize the following diff." },
  provider: "morph",
  model: "morph-v3-large",
});

console.log(result.content);

# CLI
npx @juspay/neurolink generate "Hello" --provider morph

Per-request credentials work as they do for every provider:

await neurolink.generate({
  input: { text: "Hello" },
  provider: "morph",
  credentials: { morph: { apiKey: process.env.MORPH_API_KEY } },
});

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Models

Model	Context	Vision	$/M in · out	Notes
morph-v3-large ⭐	262K	no	$0.9 / $1.9	Recommended default; a "Fast Apply" code-editing model. Emits tool-call syntax as literal text rather than a real tool call.
morph-v3-fast	262K	no	$0.8 / $1.2	Faster/cheaper sibling; silently ignores the tools parameter if one is sent.

Both models share a 262,144-token context window and a 131,072-token max output, per the catalog default.

Fallback order when the default is unavailable: morph-v3-fast.

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Verification status

Tier-2 onboarding requires evidence before a provider is accepted, and pnpm run verify:provider-onboarding gates it in CI. This is what the catalog records for Morph:

Probe	Result
Roster	authenticated GET /v1/models, HTTP 200, 2026-09-05
Auth rejection	HTTP 401, 2026-09-05
Live capability sweep	2026-09-05, probed against both models. Plain chat and streaming worked on each. Sending OpenAI's content-parts array format returned HTTP 500 (confirming the need for messageContentFormat: "string"). Tool-call requests did not produce a real tool call on either model — morph-v3-large echoed <tool_call> syntax as text content, morph-v3-fast returned a normal text answer as if no tools had been sent. response_format: json_object succeeded on both models.

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Troubleshooting

Symptom	Cause	Fix
Invalid Morph API key	MORPH_API_KEY unset or wrong	Check the key at https://morphllm.com/dashboard
Tools silently absent or echoed as text	Morph declares tools: false and doesn't honor the parameter	Use a tool-capable provider for agentic work — see provider feature compatibility
Stuck at 5 requests/minute	No payment method on file yet	Add a card in the Morph dashboard to lift the limit
Model not found	The roster changed since 2026-09-05	Use morph-v3-large or morph-v3-fast — Morph's catalog only lists these two

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See also

• Provider setup overview
• All providers
• Tier-2 onboarding — how quirks like messageContentFormat work
• Provider feature compatibility