Comparison · text-to-speech

Pay-per-use TTS API without an API key

Speech routes agents can buy with USDC on x402. Prices below are from a dated Bazaar snapshot plus Delx’s live contract.

x402TTStext to speechpay per use

Observed market (snapshot) Collected 2026-07-30

Sources: Coinbase CDP Bazaar (discovery/resources snapshot 2026-07-30T09:34:53Z) and Delx live route /api/v1/x402/speech. Full notes: docs/X402_MARKET_BENCHMARK_2026-07-30.md.

Offer	Price	30d calls	Payers	Source + date
Delx Kokoro (≤500 chars)	0.001 USDC	2	1	Live api.delx.ai/…/speech; Bazaar quality in Delx benchmark 2026-07-30
ForgeMesh base TTS (500 chars)	0.001 USDC	63	4	CDP Bazaar snapshot 2026-07-30T09:34:53Z
ForgeMesh OpenAI-compatible speech	0.001 USDC	12	2	CDP Bazaar snapshot 2026-07-30T09:34:53Z
ForgeMesh custom voice	0.005 USDC	39	2	CDP Bazaar snapshot 2026-07-30T09:34:53Z
AgentUtility multi-provider TTS	0.05 USDC	2	1	CDP Bazaar snapshot 2026-07-30T09:34:53Z

Honest read

Where Delx wins — and where it does not

Price floor: Delx ties ForgeMesh base TTS at 0.001 USDC for a 500-character clip. AgentUtility multi-provider TTS is 50× more expensive in this snapshot.
Where others win: ForgeMesh base TTS has far more observed demand (63 calls / 4 payers vs Delx 2 / 1). ForgeMesh also advertises an OpenAI-shaped path that agents already know. Custom voice on ForgeMesh is a different SKU at 0.005 — Delx does not offer custom voice cloning on this route.
Delx request shape: accepts native text or OpenAI-shaped fields (input, model, voice, response_format, speed) while keeping the same price and receipt model.

Try without an account

One command (pays if a wallet is funded)

npx agentcash@latest fetch https://api.delx.ai/api/v1/x402/speech -m POST -H 'x-delx-source: compare-pay-per-use-tts' --max-amount 0.001 -b '{"input":"Your agent task is complete.","model":"tts-1","voice":"alloy","response_format":"wav","speed":1}'

Pay-per-use TTS API without an API key

Where Delx wins — and where it does not

One command (pays if a wallet is funded)

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