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Crier

payment-readyonline

payment-ready until 2026-10-17

Outbound messaging for AI agents, paid per message.

Call it x402 v2

x402 v2

Base URL
https://crier.vimabrosta.com
Payment
x402 v2, header channel
$ curl -i 'https://crier.vimabrosta.com/v1/email'

An unpaid request returns HTTP 402 with the payment terms. Sign a payment authorization, then retry with the PAYMENT-SIGNATURE header.

Endpoints 2 paid routes on crier.vimabrosta.com

GET/v1/emailBase+Sol$0.01since 09-21
GET/v1/webhookBase+Sol$0.005since 09-21

Prices as captured in the 402 response: median $0.0075 across the 2 endpoints, unchanged since first capture.

Example 402 response

Endpoints and prices

Current paid endpoints; minimum quoted prices in USD where available; first capture dates in UTC
MethodPathDescriptionPriceNetworkAsset402 channelCaptured
GET/v1/emailNo description$0.01Base+SolUSDC, UNKNOWNheadersince 09-21
GET/v1/webhookNo description$0.005Base+SolUSDC, UNKNOWNheadersince 09-21

Payment evidence

402 payload captured at . Check evidence JSON · Measurement methodology.

First of 2 payloads captured by the monitor.

45 lines, scroll inside

{
  "error": "Payment required",
  "accepts": [
    {
      "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
      "extra": {
        "name": "USD Coin",
        "version": "2"
      },
      "payTo": "0x835323C73DD9cF4D0D23054d1ee7C11CFea34d4A",
      "amount": "10000",
      "scheme": "exact",
      "network": "eip155:8453",
      "maxTimeoutSeconds": 120
    },
    {
      "asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
      "extra": {
        "feePayer": "D6ZhtNQ5nT9ZnTHUbqXZsTx5MH2rPFiBBggX4hY1WePM"
      },
      "payTo": "8cgL7Rdey8GPcfEm8gUDsHpKjq4SD5CjADpJDFdTMFtW",
      "amount": "10000",
      "scheme": "exact",
      "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
      "maxTimeoutSeconds": 120
    },
    {
      "asset": "So11111111111111111111111111111111111111112",
      "extra": {
        "feePayer": "D6ZhtNQ5nT9ZnTHUbqXZsTx5MH2rPFiBBggX4hY1WePM"
      },
      "payTo": "8cgL7Rdey8GPcfEm8gUDsHpKjq4SD5CjADpJDFdTMFtW",
      "amount": "92265",
      "scheme": "exact",
      "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
      "maxTimeoutSeconds": 120
    }
  ],
  "resource": {
    "url": "https://crier.vimabrosta.com/v1/email",
    "mimeType": "application/json",
    "description": "Send an email from an AI agent to a person: subject, plain text (HTML optional), an optional reply-to. Delivered from a fixed relay address with a footer naming the relay and an unsubscribe link, retried on failure, with a status endpoint you can poll. Addresses that bounce, complain, or unsubscribe are refused to every future sender. Up to 4 per hour and 12 per day to one address. One-time $0.01, no account needed."
  },
  "x402Version": 2
}
Other captured 402 responses (1)

Captured payload 2 of 2

{
  "error": "Payment required",
  "accepts": [
    {
      "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
      "extra": {
        "name": "USD Coin",
        "version": "2"
      },
      "payTo": "0x835323C73DD9cF4D0D23054d1ee7C11CFea34d4A",
      "amount": "5000",
      "scheme": "exact",
      "network": "eip155:8453",
      "maxTimeoutSeconds": 120
    },
    {
      "asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
      "extra": {
        "feePayer": "D6ZhtNQ5nT9ZnTHUbqXZsTx5MH2rPFiBBggX4hY1WePM"
      },
      "payTo": "8cgL7Rdey8GPcfEm8gUDsHpKjq4SD5CjADpJDFdTMFtW",
      "amount": "5000",
      "scheme": "exact",
      "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
      "maxTimeoutSeconds": 120
    },
    {
      "asset": "So11111111111111111111111111111111111111112",
      "extra": {
        "feePayer": "D6ZhtNQ5nT9ZnTHUbqXZsTx5MH2rPFiBBggX4hY1WePM"
      },
      "payTo": "8cgL7Rdey8GPcfEm8gUDsHpKjq4SD5CjADpJDFdTMFtW",
      "amount": "46133",
      "scheme": "exact",
      "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
      "maxTimeoutSeconds": 120
    }
  ],
  "resource": {
    "url": "https://crier.vimabrosta.com/v1/webhook",
    "mimeType": "application/json",
    "description": "Deliver a signed webhook from an AI agent to a public URL: JSON or text body up to 16KB, POST or PUT, optional custom X- headers. Retried at 30 s, 2 m, 10 m, 1 h, and 6 h after your session is gone, HMAC signed with a one-time secret so the receiver can verify it, with a status endpoint you can poll. One-time $0.005, no account needed."
  },
  "x402Version": 2
}

Can I trust it score from our own monitoring

score from our own monitoring

86/100 Solid

#56 of 184 in AI. Bands: strong 93+, solid 75+, mixed 55+, weak below 55.

Reliability
98.4% uptime since 09-21
Compliance
A 14/14 checks pass
Price
$0.005 to $0.01 p34 in AI
Risk
clean no risk flag
Traction
$0.48 30d 4 buyers, top buyer 63% (address, not entity)
Last change
price changed 3d ago latest 10 in 30d
14/14 compliance checks
  • 402 payload captured
  • accepts[] array present
  • payTo address recoverable
  • payTo at accepts[0].payTo (conformant shape)
  • payTo is a valid on-chain address
  • atomic price declared
  • atomic price in a sane range
  • asset (token) address declared
  • network resolves to CAIP-2
  • payment scheme declared
  • served over HTTPS
  • declares the current x402 version (2)
  • EIP-712 domain parameters present on every EVM entry
  • x402 v2 envelope delivered in the payment-required header

402 terms unchanged since 2026-10-10. Last up 2026-10-10.

── Site signals

  • homepage reachable
  • openapi doc
  • pricing page
  • llms.txt
  • robots.txt
  • terms page
How the score works

What the score read on this service: status online, 98.4% uptime 30d, 861ms response p95, x402 compliance 14 of 14, $0.005 price against the category, on-chain traction measured. Each of those is measured, and each is published in full below.

The score comes from our own monitoring, never from reviews, operator claims, or a language model: reliability, x402 compliance, price against the category, a deterministic risk flag, and a small on-chain traction term, weighted by ranking generation 3. It is not placement anyone can buy: the paid verify tier is reported beside it and is not one of its inputs. Every component below stays published and read-only.

Bands on the 0 to 100 measured score: strong at 93 and above, solid from 75, mixed from 55, weak below 55. Price and speed are scored against the whole category field, every listing in it that carries no danger flag, the scored service included, so the score places a service in its own field.

It is a score inside AI, and only there: price and speed are scored against the whole category field, every listing in it that carries no danger flag, the scored service included, which here means 184 listings, this one among them: the same 184 the position above is counted against. When the two differ, the field is the wider one, because a listing we have measured too little of to rank still sits in the field the price and the speed are normalized over. The same service in a different field would read differently. The same engine answers GET /api/v1/best, and asked for a different pool (the whole directory, or another filter) it returns a different number for this service under this same ranking generation. Neither is more correct: they answer different questions, and the methodology states which is which.

Settled via coinbase ($0.47, 44 tx). Traction is a conservative undercount; first settlement seen 2026-09-15.

All measured facts

What it does

Outbound messaging for AI agents, paid per message. POST /v1/email ($0.01) relays an email to a person from a fixed verified sender, with a footer naming the relay, List-Unsubscribe headers, and a working unsubscribe page. POST /v1/webhook ($0.005) delivers an HMAC signed POST to a receiver you name, retried on a 30s to 6h ladder, with 4xx treated as permanent. Both return 202 with a delivery id you can poll or cancel, and nothing is sent until the payment settles. Addresses that bounce, complain, or unsubscribe are refused to every future sender, and per destination rate caps are enforced before payment rather than after it. Operated by Vima Brosta LLC.

Crier is a listed x402 AI API. Captured payment terms name Base, Solana. Monitoring and settlement figures below describe the observations available to this directory; an unpaid HTTP 402 check does not prove that a paid call will deliver.

Assessment computed at . Latest service check observed at . Service data JSON · Measurement methodology.

Page rendered at . This response time is separate from the observation and computation times attached to each measurement.

Latest endpoint observation: . Latest price capture: . Prices are recorded quotes, not a promise of availability. Token assets and payment terms are listed separately. Endpoint data JSON · Price history JSON · Measurement methodology.

Assessment computed at . Uptime uses the stated daily-rollup window; response times are in milliseconds, compliance is passed/evaluated checks, and traction is a measured settlement floor. The comparison score is out of 100 within this category. Assessment JSON · Measurement methodology.

Observed daily coverage: 2026-09-11 to 2026-10-10 UTC. Daily monitoring and settlement rollups do not expose their computation time; a bucket date is not an update timestamp. Latest settlement in the assessment: . Uptime and response JSON · Volume JSON · Buyers JSON · Measurement methodology.

Ranked from the measured category pool, refreshed at most once a minute. The comparison has no persisted computation timestamp; the assessment time above belongs to this service only. Ranking API documentation · Ranking methodology.

x402 List home · Services · AI

uptime · latest daily rollup
100%
uptime 7d
99.8%
uptime 30d
98.4%
uptime 90d
98.4%
response p95
861ms
avg response
772ms
total checks
1,710

Measured on the unpaid 402 handshake, not the paid call. A service can 402 correctly and still fail after payment.

price (min)
$0.005
price (max)
$0.01
category percentile (min)
p34 in AI
category percentile (max)
p22 in AI
endpoints / prices
2 / 2
model
tiered
stability
100%

No deterministic risk flag. Risk fires only on an exact blocklist match, or a reserved-brand name with a mismatched verified payTo. Never from low uptime, a high price, or a model guess.

domain age
73d
registrar
Cloudflare, Inc.
hosting
custom
domain created
2026-07-24

Identity facts, not a risk score.

assessment volume 30d
$0.48
exact assessment volume 30d (USD)
0.475
assessment recorded at (UTC)
2026-10-10T11:33:01.888Z
buyers 30d
4
settlements 30d
44
measured since
2026-09-15 (start of our harvest window)
last settlement
2026-10-04
top buyer share
63% of 30d volume (address, not entity)
top 3 buyers share
-
concentrated volume
no
trend 7d vs 30d
1.35x the 30d daily rate
networks
eip155:8453, solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdpKuc147dw2N9d
volume all-time
$0.48
settlements all-time
44
median settlement 30d
$0.01
max settlement 30d
$0.05

Assessment volume uses the latest 30d assessment. Over time sums daily address snapshots, rounded to cents and refreshed separately. The two sources can differ in timing, precision and shared-address attribution. Amounts use cents for comparison; known sub-cent values keep up to 12 significant digits. The exact stored assessment value is shown above.

Conservative undercount: only USDC settlements via facilitators we measure are counted. A measured floor, not an estimate.

Top buyer share lowers the on-chain traction part of the ranking score behind this page's verdict and /best, by up to half when one address holds all 30d volume. The Recommended and Highest volume sorts of the services list do not use it; they use the Concentrated volume rule instead.

member since
2026-09-21
Recent checks
Latest 18 unpaid HTTP checks, newest first; response times in milliseconds, observation times in UTC
Checked at (UTC)StatusHTTPResponseEndpoints
Online402415ms2
Online402524ms2
Online402304ms2
Online402453ms2
Online402238ms2
Online402273ms2
Online402317ms2
Online402225ms2
Online402312ms2
Online402488ms2
Online402496ms2
Online402412ms2
Online402437ms2
Online402877ms2
Online402281ms2
Online402366ms2
Online402470ms2
Online402252ms2

Changeslatest 10 in 30d

Latest 10 recorded changes, up to 10 in the last 30 days; newest first; observation times in UTC
Observed at (UTC)ChangeEvidence
price changed

GET /v1/email · solana:5eykt4usfv8p8njdtrepy1vzqkqzkvdp · UNKNOWN: 83581 → 86742

GET /v1/webhook · solana:5eykt4usfv8p8njdtrepy1vzqkqzkvdp · UNKNOWN: 41791 → 43371

price changed

GET /v1/email · solana:5eykt4usfv8p8njdtrepy1vzqkqzkvdp · UNKNOWN: 85941 → 83581

GET /v1/webhook · solana:5eykt4usfv8p8njdtrepy1vzqkqzkvdp · UNKNOWN: 42971 → 41791

price changed

GET /v1/email · solana:5eykt4usfv8p8njdtrepy1vzqkqzkvdp · UNKNOWN: 85905 → 85941

GET /v1/webhook · solana:5eykt4usfv8p8njdtrepy1vzqkqzkvdp · UNKNOWN: 42953 → 42971

price changed

GET /v1/email · solana:5eykt4usfv8p8njdtrepy1vzqkqzkvdp · UNKNOWN: 85287 → 85905

GET /v1/webhook · solana:5eykt4usfv8p8njdtrepy1vzqkqzkvdp · UNKNOWN: 42644 → 42953

price changed

GET /v1/email · solana:5eykt4usfv8p8njdtrepy1vzqkqzkvdp · UNKNOWN: 85077 → 85287

GET /v1/webhook · solana:5eykt4usfv8p8njdtrepy1vzqkqzkvdp · UNKNOWN: 42539 → 42644

price changed

GET /v1/email · solana:5eykt4usfv8p8njdtrepy1vzqkqzkvdp · UNKNOWN: 84750 → 85077

GET /v1/webhook · solana:5eykt4usfv8p8njdtrepy1vzqkqzkvdp · UNKNOWN: 42375 → 42539

price changed

GET /v1/email · solana:5eykt4usfv8p8njdtrepy1vzqkqzkvdp · UNKNOWN: 83375 → 84750

GET /v1/webhook · solana:5eykt4usfv8p8njdtrepy1vzqkqzkvdp · UNKNOWN: 41688 → 42375

price changed

GET /v1/email · solana:5eykt4usfv8p8njdtrepy1vzqkqzkvdp · UNKNOWN: 86222 → 86292

GET /v1/webhook · solana:5eykt4usfv8p8njdtrepy1vzqkqzkvdp · UNKNOWN: 43277 → 43146

price changed

GET /v1/webhook · solana:5eykt4usfv8p8njdtrepy1vzqkqzkvdp · UNKNOWN: 43111 → 43277

price changed

GET /v1/email · solana:5eykt4usfv8p8njdtrepy1vzqkqzkvdp · UNKNOWN: 87305 → 86222

GET /v1/webhook · solana:5eykt4usfv8p8njdtrepy1vzqkqzkvdp · UNKNOWN: 43492 → 43111

Amounts are on-wire atomic units in the named asset.

all changes

Over time

On-chain volume daily snapshots, USD 30d: $0.48, peak $0.15 on 09-27
volume no data in the payload
Distinct buyers per dayDistinct buyers per day
Uptime 3 of 25 completed days below 100%
uptime below 100%, to scale
Volume 30d
$0.48
Uptime
3 of 25 completed days below 100%
Daily on-chain settlement volume in US dollars, 2026-09-11 to 2026-10-10; highest day $0.15 on 09-27; 17 days have no data in the payload; distinct buyers per day
More charts
Response time daily average, ms min 399ms, avg 892ms, max 4321ms

09-11 to 10-10* UTC

Scores over time

x402 compliance low 13/13, high 13/13

09-11 to 10-10* UTC

Price percentile in AI own low to high; exact values below

09-11 to 10-10* UTC

Site signals present (of 6) own low to high; exact values below

09-11 to 10-10* UTC

Scores: one day per column, 09-11 to 10-10*, on the columns of Response time. Uptime held below 100% on some days in this window, including any partial day. Daily readings remain in the Uptime strip and Values. The checklist grew from 11 to 14 checks on 2026-07-28, before this window. Pillar lines use their own low and high. Exact dated readings are available in each readout and in Values.

Each series spans only the dates it has data for. Every series is also served as JSON at /api/v1/services/crier/price, /scores, /volume and /buyers.

Values

* today so far, partial (UTC).

The uptime summary counts completed UTC days only. The strip, readouts and table retain today's partial reading.

Daily snapshot total, 30d: $0.48, peak $0.15 on 09-27. The visible 30d total in Traction comes from the latest assessment. These sources can differ in their window, refresh time, cent rounding and shared-address attribution.

Daily address snapshots: 2026-09-11 to 2026-10-10 UTC; * today so far, partial (UTC). Daily snapshots store cents. A recorded $0.00 with settlements cannot distinguish exact zero from volume rounded away. Lost precision is unavailable here.

Settlement volume uses the stored USD valuation of tracked payments; it is distinct from token quantities. USD-pegged assets are valued at 1 USD per token in these rollups. The measured settlement floor does not cover all payments to this service.

Assessment history last recorded at . Each UTC day uses its last recorded run; missing readings stay unmeasured. Assessment history JSON · Measurement methodology.

Daily values, 2026-09-15 to 2026-10-10: address settlement volume in USD, distinct buyer and settlement counts, uptime percent, average response milliseconds, compliance passed/total, price percentile 0-100, site signals out of 6; UTC dates
DayVolumeBuyersSettlementsUptimeResponseCompliancePrice percentileSite signals
2026-09-15$0.0212no datano datano datano datano data
2026-09-16no datano datano datano datano datano datano datano data
2026-09-17no datano datano datano datano datano datano datano data
2026-09-18$0.0511no datano datano datano datano data
2026-09-19no datano datano datano datano datano datano datano data
2026-09-20no datano datano datano datano datano datano datano data
2026-09-21no datano datano data81.63%4321.08ms13/13p346/6
2026-09-22no datano datano data80.9%3918.15ms14/14p346/6
2026-09-23$0.0212100%600.77ms14/14p346/6
2026-09-24$0.0111100%494.68ms14/14p346/6
2026-09-25$0.0212100%544.63ms14/14p346/6
2026-09-26no datano datano data100%516.69ms14/14p336/6
2026-09-27$0.15115100%608.03ms14/14p336/6
2026-09-28$0.0212100%596.84ms14/14p336/6
2026-09-29$0.0414100%591.51ms14/14p336/6
2026-09-30no datano datano data100%564.00ms14/14p346/6
2026-10-01no datano datano data100%593.03ms14/14p346/6
2026-10-02no datano datano data100%598.03ms14/14p346/6
2026-10-03no datano datano data100%621.69ms14/14p346/6
2026-10-04$0.15115100%550.83ms14/14p346/6
2026-10-05no datano datano data100%429.67ms14/14p346/6
2026-10-06no datano datano data100%399.36ms14/14p346/6
2026-10-07no datano datano data100%431.47ms14/14p346/6
2026-10-08no datano datano data98.89%470.87ms14/14p346/6
2026-10-09no datano datano data100%547.06ms14/14p346/6
2026-10-10*no datano datano data100%442.72ms14/14p346/6

Alternatives in AI

Cluster Protocol strong 99/100 100% up 30d $55.7k 30d
x402engine strong 94/100 100% up 30d $46.02 30d
NetIntel strong 94/100 100% up 30d $20.88 30d
Agent402.tools strong 93/100 99.7% up 30d $202.84 30d
GlianaAI strong 93/100 100% up 30d $36.57 30d

5 of 183 other ranked services in AI, ordered by the same measured score.

see the whole category

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HTML

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Markdown

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Delisting

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